CHAPTER XLIV.

THE FALL OF KHARTOUM.

Gordon's Diaries bring the history of the siege of Khartoum down to the

14th December, 1884. The relative positions of the besiegers and

besieged at that date may be seen from the accompanying plan.

It will be observed that Khartoum was protected on the north and west

sides by the Blue and White Niles respectively, and on the south and

east by a line of intrenched fortifications, with intervening redoubts,

running from Fort Buri, on the Blue Nile, almost to the White Nile.

Unfortunately, at this time, the late high Nile had washed away portions

of the parapet for a considerable distance from the western end, and,

now that the river had fallen, there was a serious gap in this part of

the defences. To remedy this, Gordon had for some time employed working

parties to repair the demolished parapets, but as the work had to be

conducted under fire from the enemy's troops at Omdurman, on the

opposite bank, but little progress had been made. The ditch at this

point was also more or less damaged by the action of the river, and was

never completely restored. To guard this, the weak part of the position,

Gordon stationed armed barges and native boats on the river close by. He

also placed mines there, but these were destroyed by the Nile. In the

rear of the line of ramparts, and between them and the town, extended an

open plain, a little more than a mile in breadth, on which stood

barracks and slaughter-houses, and here and there an Arab cemetery. On

the south and east sides, fronting the fortifications, were the camps

of the besieging armies of Wad en Nejumi and Abu Girgeh.[117]

[Illustration]

The army under the immediate command of the Mahdi was encamped on the

west of Omdurman, where Mohamed Faragallah Bey, with some Egyptian

soldiers, was still holding out, in a work called Fort Omdurman. A large

force of Dervishes,[118] under Sheikh-el-Obeid, occupied a position at

Khojali, on the north side of the Blue Nile, where Gordon also had a

fort called "the North Fort," at a point named "Ras-el-Rasek," as well

as a battery on Tuti Island, nearly opposite.

On the 14th December Gordon wrote, "In ten days the town may fall."

There were then in store 83,525 okes (or 227,000 lbs.) of biscuit, and

546 ardebs (or 2,700 bushels) of dhoora (Indian corn), representing

approximately eighteen days' rations for the troops alone. But Gordon

had already, on the 22nd November, found it necessary to issue 9,600

lbs. of biscuit to the poor in the town, so great was the destitution

which prevailed. As the siege progressed this state of things became

more and more aggravated, and the Government supplies had to be further

drawn on for the benefit of the civil population.

Ever since the 3rd of November the Fort of Omdurman had been cut off

from communication with Khartoum. It was then provisioned only for a

month and a half, and at the end of the year the garrison was in great

straits from want of food. Gordon made one or two efforts to relieve the

garrison, but, having no longer his steamers, four of which had gone to

meet the British expedition, and the fifth having been lost with Colonel

Stewart, he was unable to open communication.

On the 5th January, 1885, Faragallah signalled that his provisions and

ammunition were alike exhausted, and Gordon was compelled to reply that

there was nothing for it but to surrender. Faragallah and the whole of

the force at Fort Omdurman then capitulated, and were transferred to the

Mahdi's camp, where they were well treated, as an encouragement to

others to join the Dervish ranks.

On the 6th January, seeing that the garrison of Khartoum was becoming

daily more and more reduced by want of food, and that existence for many

of the inhabitants was almost impossible, Gordon issued a Proclamation

authorizing as many of the civil population as liked to leave the town

and go over to the Mahdi. Some thousands of natives took advantage of

the offer, and Gordon sent with them a letter to the Mahdi, asking him

"to feed and protect these poor Moslem people as he (Gordon) had done

for the last nine months." After the fugitives had left, it was

estimated that only about 14,000 remained in the town, out of a

population shown by the census taken in the September previous as

34,000.

The fall of Omdurman was a great blow to the garrison of Khartoum, who

thus lost the only position they had on the west bank of the White Nile.

The Dervishes were thenceforth able to close the river to Gordon's two

remaining steamers, and to establish ferries south of Khartoum, giving

easy communication between the camps at Omdurman and those of Wad en

Nejumi and Abu Girgeh. Khartoum was practically hemmed in on three

sides.

The food difficulty became daily more serious. To make matters worse,

those in charge of the biscuit and dhoora stole quantities of both, as

occasion offered. The officer in charge of the stores was arrested and

brought before a court of inquiry, but Gordon, realizing the emergency

of the situation, had to point out to those conducting the investigation

the necessity of not inquiring too critically into the matter.

The Island of Tuti was still held by Gordon's forces, and the crops

there were reaped under the fire of the forts, and stored in the

Commissariat. This produced about 1,600 bushels of corn altogether,

which, with the remaining biscuits, were served out to the soldiers.

When this was finished, Gordon ordered a search to be made in the town,

with the result that further quantities (32 bushels only) were

discovered in some of the houses, and also buried in the ground. These

also were taken to the Government store, the owners being given, in

every case, receipts for the quantities carried off. The search was

conducted daily until there was nothing left in possession of the

inhabitants.

Soon all that had been collected in the Commissariat was finished, and

then the soldiers and inhabitants were reduced to eating dogs, donkeys,

skins of animals, gum, and palm-fibre. Then an actual famine prevailed.

The gum produced diarrhoea, and the soldiers became so weak that they

could scarcely man the fortifications.[119] The situation of the civil

inhabitants was even worse. Many died of actual starvation, and corpses

lay about the streets, no one having sufficient strength or energy to

bury them.

All this time the enemy kept up a fusillade on the garrison,

occasionally killing a few of their number. The soldiers were also

harassed by repeated night attacks.[120]

Although it must have been evident to Gordon that the end could not be

far off, he continued to encourage the people by Proclamations

announcing the near approach of the British Relief Expedition, and even

went so far as to hire some of the principal houses on the river for the

reception of the men belonging to it. Day by day he watched from the

roof of his Palace, in the hope of seeing them arrive. After awhile many

of the inhabitants began to lose faith in him, and commenced opening

communications with the Mahdi.

On the 20th January, the news of the battle of Abu Klea reached the

Mahdi's camp, where it caused the greatest consternation. A Council of

Emirs was thereupon held, at which there were great divergencies of

opinion. The Mahdi himself was strongly in favour of raising the siege.

He told the Emirs that he had been warned in a vision that he was to

make a "Hegira," or flight, to Obeid, whither he proposed to withdraw

with his forces. He said, "If one Englishman had been able to keep us at

bay for a year, what chance shall we have against thousands of

Englishmen who have defeated our best men at Abu Klea?" All agreed

except one Emir, named Mohammed Abd el Kerim, who said that an attempt

should be made to take Khartoum by assault, adding, rightly enough, that

if it succeeded the English would not dare to come on, and that, if it

failed, there would always be time to retreat. Abd el Kerim's views, for

the time being, prevailed, and there was no longer any talk of raising

the siege.

Before the meeting terminated it was decided to announce a great

victory. Accordingly a salute of 101 guns was fired, the war drums were

beaten, and every demonstration was made, as if in celebration of some

great triumph. The stratagem failed to impose on Gordon, who had seen,

through his glass, thousands of women in the camp, weeping and

indulging in signs of despair. The actual news of the battle was

conveyed to him shortly after by a female spy from Omdurman.

A Council, composed of Farag Pasha, the Military Commandant, the chief

Government officials, the Greek Consul, and other leading members of the

Greek colony, was hurriedly summoned to the Palace. The meeting was then

informed of the victory at Abu Klea, and that the English were

approaching, and would arrive in two or three days. This intelligence

inspired everybody with fresh hope, only, however, to give place to

deeper despair when the next few days passed away without any signs of

the relieving force. Gordon still struggled to keep up the spirits of

his men, constantly saying, "They must come to-morrow," though few

believed in him, and people began to say that, after all, the great

battle which had taken place must have been a Dervish victory.

It is said that Gordon at this time took no sleep, but spent his days in

watching the river from the roof of the Palace, and his nights in

visiting the various posts.

On the 23rd, he had a stormy interview with Farag Pasha, whom he

reproached with having left one of the forts insufficiently guarded. It

seems that Farag, on this occasion, proposed to surrender Khartoum to

the Mahdi, and stated the terms which the latter was willing to accept.

Gordon indignantly refused to listen to the proposition, and is even

said to have struck Farag.

There is no doubt that, at this period, not only Farag, but many of the

other officers and Government officials, as well as some of the leading

merchants, were in correspondence with the Mahdi, who was also kept

posted up in the condition of the garrison by the deserters who, from

time to time, left Khartoum. On one night alone, Omar Agha Ibrahim, a

lieutenant of infantry, after taking the precaution of drawing half a

month's pay for himself and his men, went over to the enemy with thirty

of his comrades.

By the way of final preparations, Gordon had all the ammunition and

powder not required for daily use removed from the Arsenal and placed in

the Catholic Church, a strong stone building near the Palace, and

commenced to lay a slow match train between the two buildings, so as to

enable him to explode the whole supply, in the event of the Mahdists

entering the town.[121]

To provide for the safety of the Europeans, he stationed the small

steamer _Ismailia_ just beyond the Palace walls, with orders to the

engineer to get up steam on a signal being made. The arrangement was

kept secret, being communicated only to the principal Greek residents,

who, it was proposed, should go on board with their families at the last

moment and save themselves by the river.[122]

Meantime the Mahdi had full information of the movements of the British

expeditionary force. The delay in the advance from Metammeh inspired

both him and his followers with fresh courage. It also gave support to

Mohammed el Kerim's arguments, and when, on the 24th, intelligence was

received that two steamers had started from Metammeh, a Council was held

at which it was determined to act on his advice and make the attack

before the vessels should arrive.

This decision was, to some extent, influenced by the circumstance that

the Mahdi had opportunely had another vision, in which, this time, the

Prophet had assured him "that Allah had put the lives of the garrison

into the Mahdi's hands, and that the attack should be made early on the

morning of Monday, the 26th."

On the 25th Gordon was slightly ill, and, it being Sunday, he did not

appear in public. Through mental strain and trouble his hair had grown

completely white. Although he appeared to realize that the end could not

be much longer postponed, he was repeatedly heard to say that, if he had

only a couple of English soldiers to parade on the ramparts, he should

not fear the enemy's attack.

In the morning he observed a great movement in the hostile lines, and

called many of his officers, and the leading men of the town, to the

Palace. After telling them that he thought the attack was impending, he

appealed to them to make a last effort, as he believed that the British

troops would arrive in twenty-four hours. He called upon every male

inhabitant--even the old men--to assist in manning the fortifications.

It was a gloomy Sunday in Khartoum, and as the day went by without any

signs of the relieving force, despair settled down over all. When night

came many of the famished soldiers left their posts on the ramparts and

wandered into the town in search of food. Others were too weak, from

want of nourishment, to go to their stations. Although this was not an

unusual occurrence of late, the number of defaulters that night was so

great as to cause the most serious alarm in the town, and many of the

principal inhabitants armed themselves and their servants and went to

the fortifications in place of the soldiers.

Gordon, who had established a complete system of telegraphic

communication with all the posts along the lines, sat up alone writing

in the Palace till after midnight, and then, worn out with anxiety and

fatigue, fell asleep.

In the early part of the night, which, after the moon had set, was dark

and cloudy, the Mahdi crossed over from Omdurman with a huge mass of his

followers and joined the armies of Wad en Nejumi and Abu Girgeh, drawn

up on the south and east faces of the fortifications. After addressing

the combined forces and giving his final orders, the Mahdi then returned

to Omdurman, leaving Wad en Nejumi to conduct the attack.

At about 2 a.m. on the 26th, the entire force, under Wad en Nejumi,

numbering from 40,000 to 50,000 men, began its advance. It moved in two

divisions. The foremost was told off to attack the lines to the westward

at the point between the Messalamieh Gate and the White Nile, where the

defences had been partially destroyed by the river. The other division

was to attack towards Buri, at the opposite, or eastern, extremity of

the lines, or in the event of the attack on the White Nile side proving

successful, to follow in the track of the foremost division and thus

enter Khartoum. The instructions were to march as silently as possible,

and not to fire until fired upon by the defenders.

Carrying "angaribs," or couches of palm boughs, and bundles of

brushwood, to throw into the trenches, under cover of the darkness the

Dervishes marched noiselessly close up to the lines till the ditch was

reached. This they found partly filled with mud and the parapet broken

away. A few of the Dervishes fired in reply to the fire from the lines;

the remainder, charging with spears, dashed into the trench and up the

opposite side, shouted their war cries, and, meeting but little

resistance, effected an entrance into the works.

The defenders only perceived the advance a few minutes before the actual

attack, when the alarm sounded. The greater part of the troops were so

tired and worn out that it was not till the sentries fired that the rest

of the garrison started up, to find the enemy swarming across the ditch

and up the broken parapet. When once the Dervishes were upon them,

Gordon's soldiers made but little fight. Too feeble to withstand the

rush, some were killed, and still more broke and fled. In a few minutes

all resistance at this part of the position was over, and whilst a

stream of Dervishes from behind, pouring in through the place where the

entry had been effected, pushed on and entered Khartoum, those in front

rushed along inside the parapets and attacked the defenders in the rear.

These last, stationed at distances of from three to four paces apart,

and hopelessly outnumbered, could do but little. They fired a few shots

and were then either killed or dispersed--leaving the enemy in

undisputed possession of the fortifications. Over 150 soldiers' bodies

were afterwards counted on the parapets alone.

The Commandant, Farag Pasha, was at Buri, at the further end of the

fortifications, when the assault was made, and at once rode down the

lines, encouraging his men. When he reached the Messalamieh Gate, the

Dervish horde had already crossed the ditch and were rolling up the line

of the defenders on the parapets. Farag, seeing that resistance was

useless, opened the Messalamieh Gate and surrendered himself prisoner. A

great many of his followers also rushed out through the gate and threw

down their arms. Charges of treachery have been brought against Farag

for his conduct on this occasion, but, seeing that the enemy were well

within the position when the gate was opened, this act could not have

affected the issue one way or another. Farag's having been put to death

in the enemy's camp three days later also tends to rebut the accusation

of having betrayed his trust.

Mohamed Bey Ibrahim, who commanded at the same gate, formed his men,

consisting of two companies, into a square, and, taking up a position on

the plain between the lines and the town, fought courageously till he

and nearly all his men were killed.

Bakhit Betraki was in charge at Buri, and held his ground till, seeing

that the enemy had carried the works at the other end, and were inside

the lines, he abandoned the fortifications. Then, rallying his men, he

fought as long as any of them were left alive.

Notwithstanding the resistance offered in this and other instances, the

Dervish loss was but trifling, only from 80 to 100 being killed in the

whole operations, which, from the time the first gun was fired till

Khartoum was taken, are said to have lasted three hours.[123]

The soldiers who had been placed on board the barges and armed boats on

the White Nile, as already stated, made but very slight resistance. They

did a little firing at the moment of the first assault, after which they

forsook the boats and fled.

The garrisons at Tuti Island and at "the North Fort" were, from the

nature of their positions, unable to take any active part in the fight;

they fired occasionally from their guns, but when Khartoum fell they all

surrendered without further opposition.

The party of Dervishes who, when the first attack succeeded, pushed on

to Khartoum, at once took possession of the town and began massacring,

pillaging and looting everywhere.

Their first thought was to rush for the Palace, where they expected to

find the treasure, as well as Gordon, the man who had so long and so

successfully resisted them.

Gordon, who had with him a company of black troops as a guard, on being

aroused by the noise of the attack, went on the roof of the Palace,

which stood on the northern side of the town facing the Blue Nile, and,

finding that the enemy had entered the works for upwards of an hour,

kept up a hot fire in the direction of the attack. As dawn approached he

could see the Dervish banners in the town. Soon the gun which he had

mounted on the roof became useless, as it could not be depressed

sufficiently to fire down upon the Dervishes, who were by this time

crowding in thousands round the Palace. Gordon, seeing that resistance

was useless, then quitted the roof, put on his Pasha's white uniform,

and, with his sword by his side and his revolver in hand, placed himself

at the door of his divan just at the top of the grand staircase. Here he

stood and calmly awaited his fate.

A small band of Wad en Nejumi's followers forced their way into the

building and dashed up the steps. Gordon asked them who was their

leader. The only reply that he got was a curse, and one of the band

plunged his spear into Gordon's body. Gordon made no attempt to defend

himself, but turned away with a disdainful gesture, when he was again

stabbed from behind and fell forward on the ground. Others of the party

then rushed up and cut and hacked at the prostrate body until life was

extinct. This was shortly before sunrise--whilst hundreds of Dervishes

swarmed up to the Palace roof and slaughtered the soldiers there.

Gordon's body was dragged down the steps to the garden, where the head

was cut off, wrapped in a handkerchief, and taken to the Mahdi. The

Mahdi is said to have been very angry at Gordon's death. His idea had

been to convert him to Mahdism, and afterwards to hand him over to the

Government in exchange for Arabi Pasha. Gordon's head, after being shown

to Slatin Pasha, then a captive in the camp, was hung on a tree at

Omdurman, where multitudes of the Mahdi's followers cursed and insulted

it. His body was left in the garden the whole day, and thousands of the

Dervishes came up and plunged their spears into it. Later on it was

thrown, with many others, into one of the wells adjoining.[124]

The steamer which Gordon had placed near the Palace was of no assistance

at the critical moment. The captain saw the mob rushing to surround the

building, and waited for Gordon to arrive. Later on, probably at the

moment when Gordon met his end, a crowd of Dervishes made for the

vessel, which, to escape being captured, steamed out into mid stream and

moved backwards and forwards until the captain received a message from

the Mahdi, offering him pardon if he would give up the steamer, which

was thereupon surrendered.

After the Palace had been taken the Catholic mission building and church

were the next objects on which the mob directed themselves. The guards

in the grounds outside were at once killed, and the assailants then

broke into the building, killing and looting everywhere.

The massacre in the town lasted six hours, and 4,000 persons at least

were killed. The black troops were spared, except such as resisted. The

Bashi-Bazouks, fellaheen regulars, and the Shaggiah irregulars were

mostly killed in cold blood after they had surrendered and been

disarmed. Large numbers of the townspeople and slaves were either killed

or wounded.

At 10 a.m. the Mahdi sent orders to stop the massacre, which then

ceased, and the Dervishes devoted themselves exclusively to looting. The

Mahdi had promised his followers as much gold and silver as they could

carry when Khartoum fell, and immense disappointment was expressed when

they failed to find the expected treasure, for which Gordon's bank notes

formed but a poor substitute.[125]

The bloodshed and cruelty which attended the massacre are said to be

such as defy description. Nicola Leontides, the Greek Consul, had his

hands first cut off and was then murdered. Martin Hansel, the Austrian

Consul, and the oldest member of the European colony, was alive up to 2

p.m., when a party of Arabs, headed by his own janissary, entered his

house and beheaded him, together with a man named Mulatte Skander, who

lived with him. The two bodies were then taken outside, covered with

petroleum and set fire to. The Austrian tailor, Klein, on making the

sign of the cross, had his throat cut from ear to ear before the eyes

of his wife and children. The savages then buried their lances in the

body of his son, aged seventeen, who fell lifeless. The mother, a

Venetian by birth, seized her son of five years old with one hand, and,

holding her baby to her breast with the other, struggled heroically to

prevent their taking her children from her. Eventually they seized her

daughter, a girl of eighteen, who was carried off to add to the other

booty taken.

Numbers of women, and even children, perished in the general slaughter.

Of the survivors, all the young and good looking women and girls were

taken off to the "Beit el Mal," the Mahdi's treasury, where the loot was

ordered to be collected. There they lay exposed like cattle in a pen,

awaiting their turn to be selected to fill the harems of the conquerors.

The first choice lay with the Mahdi himself, then followed the various

Emirs, each in order of his rank. The women who were not chosen were

distributed among the soldiers. The old women were given a few rags with

which to cover themselves, and then sent to the Dervish camp to eke out

a miserable existence by begging.

The number of Europeans made prisoners is stated to have been about

ninety altogether, besides several thousands of natives. Most of these

were removed to Omdurman, where they were left to get on as best they

could, and exposed to many privations.

Only two days later, on the 28th, whilst the Mahdi's army was still

engaged in celebrating the victory, Wilson's two steamers were observed

slowly making their way up stream in the direction of the north end of

Tuti Island, firing as they advanced both from guns and rifles. It was

at once decided to oppose the landing of the red-coated soldiers who

could be seen on board. All rushed to the river's bank, the women

shouting "Môt lil Inglesi" ("Death to the English").

After reaching a point mid-way between Tuti Island and the left bank of

the White Nile, and apparently looking for indications as to the fate of

Khartoum and Gordon, the steamers were seen to turn round and proceed

down the river under a hail of bullets from the shore.

The news of the fall of Khartoum, after a siege of 317 days, or only

nine days less than that of Sebastopol, reached the War Office in London

at a quarter of an hour before midnight on the 4th February. It was

communicated by a despatch from Lord Wolseley, sent from Korti, at 9.10

p.m. on the same day.

The War Office officials, many of whom were summoned on the receipt of

the despatch, hesitated to believe the news it contained, until it

should be confirmed by later intelligence, and the representatives of

the Press Association were informed that nothing would be published till

the following day. On the 5th the despatch appeared in the second

edition of several of the morning papers, and England realized to the

fullest extent the bitterness of a great national disappointment. All

the gallantry and devotion of her officers and men had been unavailing;

the costly Nile Expedition had proved a dismal failure; and Gordon had

been allowed to perish.

The general feeling on the subject was intensified by the reflection

that but two days elapsed between the fall of Khartoum and the arrival

of the British troops before the town. The Government of Mr. Gladstone

was severely reproached with having been once more "too late."

As to the part taken by Sir Charles Wilson, there was a strong tendency

to censure the delay which had occurred in the departure of the steamers

for Khartoum. Sir Charles, in a letter to Lord Wolseley, gave full

explanations on this subject. He based his reasons for not starting

sooner on the following considerations:--

1st. The military situation. The force had been much weakened by its

losses in the fighting on the 17th and 18th January, and would be

further reduced by the convoy and escort which it was necessary to send

back to Gakdul. The horses and camels were so "done up" from fatigue and

want of food, as to be unable to reconnoitre any distance.

Reinforcements for the enemy were reported as advancing both from

Omdurman and Berber, and it was necessary for him, before leaving, to

ascertain that the small British force at Gubat was not liable to

attack.

2ndly. The necessity of changing the men in the steamers (in accordance

with Gordon's advice) and replacing them by Soudanese.

3rdly. The steamers' engines required to be overhauled, and the vessels

themselves had to be prepared for resisting the batteries which it was

known they would have to fight on their way to Khartoum.

4thly. Gordon was known to be still holding out, and there was nothing

to show that the expected crisis, so long delayed, would take place in

the next few days.

As a fact, the steamers from Khartoum reached Gubat on the 21st January,

whilst the British were engaged with the enemy at Metammeh; and Wilson

received the letters which General Gordon had sent down between three

and four p.m. on that day. The earliest possible date for starting

would, therefore, be on the morning of the 22nd, and Sir Charles pointed

out that, if the steamers had left at that time and travelled at the

same rate as they subsequently did, they would then only have reached

Khartoum at mid-day on the 26th, when it had already fallen.

Sir Charles might, without exaggeration, have enlarged on the condition

of his forces, which were so utterly used up--both men and animals--that

a short interval of comparative repose was indispensable before anything

further was attempted. That in spite of their condition they should have

been able to undertake the abortive attack on Metammeh on the 21st,

speaks volumes for their pluck and endurance.

Even if Wilson had disregarded all other considerations and pushed on at

once with his handful of soldiers, there is every reason to suppose that

the result would have been the same. From what has subsequently been

ascertained, it is clear that for weeks previously the Mahdi had

Khartoum at his mercy, and could have taken it at any moment, though he

preferred that it should fall by the slower process of starvation.

He had full information of Wilson's movements, and had the latter

started two days earlier, the only result would have been that the

capture of the town would have been accelerated by precisely that period

of time.

It would be too much to imagine that if the subaltern's guard which

Wilson had at his disposal had reached Khartoum whilst it still held

out, it could (notwithstanding Gordon's expectations to the contrary)

have changed the fortunes of the day, or have induced the Mahdi to carry

out his idea of raising the siege and retiring to Obeid. For this, the

presence, or at least the advance, of the whole force at Gubat was

necessary.

As it happened, the column at Gubat was not in a condition to advance,

and the Mahdi, knowing that at the worst he had only the two steamers

to reckon with, determined to risk an assault.

The responsibility for the disaster may be traced partly to the

insufficient supply of camels to the Desert Column, owing to which

Stewart, instead of pushing on at first straight across the Bayuda

desert, was compelled to return from Gakdul Wells to Korti, and then

make a fresh start, thus losing twelve days' valuable time. But after

all, the main responsibility will always rest with the Government which

so long delayed despatching the Relief Expedition, and then, as if to

make its failure the more certain, sent it by the wrong route.

The Egyptian campaigns, 1882 to 1885 · 第 17 / 43 章