CHAPTER XII.

THE MYSTERY.

Ned was unable to form any idea as to the cause of such a doleful sound.

He knew, or thought he did, that there was no one on the key when they

lay down, and yet there could be no mistaking the fact that something

unusual was going on.

The most natural course appeared to be the awakening of Roy, but this

was not accomplished without considerable difficulty, for the cook was a

very sound sleeper, and on this particular night it seemed as if his

eyelids were glued together.

It might have been really impossible to arouse him if, just at the

moment when he was more nearly awake than at any time since Ned began

operations, the groan had not been heard.

This time it was of a most doleful kind, and so loud that one might have

heard it half a mile away.

Roy was wide awake in an instant, asking wildly as he scrambled to his

feet:

“What was that?”

“We’ve been trying to find out,” Ned replied. “I can’t think of anything

around here that could make such a noise. It’s horrible!”

“Light one of the lanterns.”

“What good will that do?”

“If any one attempts to get in here we shall be able to see what is

going on,” Roy whispered.

“And if the thing which made the noise is bent on mischief, the light of

the lantern showing through the canvas might make matters worse.”

“But we must try to learn what’s the matter.”

“I’ll creep softly out if you fellows will follow. I’m willin’ to admit

that it frightens me an’ don’t care to take the chances of going alone.”

“I’ll stay close at your heels.”

Ned started, but did not attempt to rise to his feet.

Convinced that an enemy was near at hand, such a course hardly seemed

prudent, and he wriggled along over the sand until it was possible to

gain a view of that portion of the island directly in front of the tent.

The stars were shining brightly and he could see surrounding objects

distinctly, but nothing unusual met his gaze.

As a matter of course it was impossible to peer through the grove in the

gloom, and while he was wondering if some animal was not among the

trees, the fearsome noise was heard again.

It appeared to come from the rear of the tent, and Ned turned back to

whisper to his companions:

“I can’t see a thing, but whatever has come must be in our rear. Shall

we go out?”

“We’ve got to learn what it is.”

“I think some animal has swum up from the sea. At all events, we’ll soon

know. Don’t make the slightest noise as you follow me.”

Then very cautiously Ned crept out until he had a full view of the

shores and as far back in the interior as the center of the island.

There was not so much as a bird to be seen, and what seemed very

strange, the groan was not repeated, although they listened intently

fully five minutes.

Then he rose to his feet and his companions did the same.

The most perfect silence reigned save for the soft lip, lip, lipping of

the water on the sandy shore.

“Well, that beats me!” Ned said aloud after ten minutes had passed and

nothing was heard. “It can’t be that all three of us have been

dreaming.”

“There was more than a dream in that terrible noise,” Vance replied with

a shudder.

Ned led the way completely around the tents and then to the edge of the

grove without having discovered anything.

“It’s certain we haven’t visitors, and the best thing we can do is to go

to bed again.”

“I shan’t be able to get another wink of sleep to-night,” Vance said in

a voice that trembled woefully.

“Then you’ll be on hand to let us know if it comes again. But I won’t

make fun of you,” he added as he saw the look of horror on his

companion’s face, “for it was enough to frighten a wooden man, and I was

as badly scared as any one. There’s no use in staying out here any

longer now we’re certain nothing’s in sight.”

Ned led the way back to the tent, and once there Roy took good care to

light two lanterns.

“It won’t do any harm to leave them burning,” he said

half-apologetically. “If we hear the noise again we can at least see

each others’ faces, and there’ll be some little comfort in that.”

Neither of the party felt very much like indulging in slumber for a long

while, and they sat cross-legged on their beds talking in whispers of

what was to them, as indeed it might have been to any one, the most

profound mystery.

No reasonable theory could be formed regarding it, and after an hour had

passed with nothing to cause additional fear, one after another of the

little party began to grow sleepy, until all were slumbering soundly

once more.

If there were any more groans on the island during the night the

castaways were in blissful ignorance regarding them, and not until the

sun had been up from his bath in the sea fully an hour did either of the

party awaken.

Ned was the first to open his eyes, and after rousing his companions he

ran out of the tent to look for strange footprints in the sand.

If their unwelcome visitor had come from the sea there must have been

some signs left behind, yet Ned failed to find any.

He returned to the tent with joyful tidings, however.

“The yacht must have worked herself off some during the night!” he

cried. “The hawsers are considerably slacker than when we saw them last,

and I fancy she isn’t heeled over quite so much.”

Vance and Roy ran out of doors to assure themselves by a personal

inspection that such was the case, and the former said, after looking

scrutinizingly at the little steamer:

“I think you are right, Ned, and I sincerely hope so. If that craft was

afloat I wouldn’t sleep another night on this island. I can stand a good

deal, but when it comes to living where dead men are prowling around,

then I get more than I need.”

“You surely are not foolish enough to believe that what we heard last

night was caused by those wretches whom we buried,” Roy said in

surprise.

“Tell me what else could have made the noise, and I’ll own up to being

foolish.”

“Of course I can’t do that; but this much I’ve got sense enough left to

understand, that there’s no such things as ghosts.”

“Then what made the noise?”

Roy turned away unwilling to continue such a profitless conversation,

and Ned said decidedly:

“If it is heard again I’ll get at the bottom of the mystery, or know the

reason why. We should have gone directly outside when the noise was

first heard.”

“You were prowling around soon enough to distinguish anything, if it

could be seen,” Vance persisted, “and I have an idea you failed to find

the tracks you counted on.”

“How did you know that?”

“I watched while you were searching, and, of course, understood what you

expected to see.”

Ned joined Roy at the tent without making any further reply.

He did not believe in ghosts, but at the same time it made him just a

trifle nervous to have Vance attribute the disturbance to an unearthly

source.

There was too much work to be done before sunset to permit of spending

many moments discussing what was so profitless as the subject of ghosts.

The hawsers were to be hauled in until they should be as taut as on the

night previous, and Ned was revolving in his mind the use of blocks and

wedges to bring the yacht on an even keel more quickly.

In order to perform this labor, however, it was necessary all hands

should assist, therefore Ned was forced to remain idle until after

breakfast had been prepared and eaten.

This did not prove to be such a very long task, owing to the fact that

all hands assisted in the work, and at a reasonably early hour the

wreckers were ready for business.

The hawsers were drawn as taut as possible once more, and Ned said in a

tone of satisfaction when this had been done:

“There; now it’s for the tide to do the rest. If it helps us as much as

it did last night, we shan’t have to work a very long while in order to

get her into the bay. Now we’ll rig something to shore her up on this

side, and that will come pretty near finishing the day.”

He set about this portion of the work with such zeal and determination

that the others, urged on by their fear caused by the noises heard on

the previous night, were soon laboring with feverish eagerness, and

before the tide had turned all had been done that was possible until the

hawsers should need tautening once more.

“Now we can afford to rest,” Ned said as he walked slowly toward the

tent, wiping the perspiration from his face.

“And it’s high time,” Roy replied with a laugh. “It plays a fellow out

mighty fast to keep at a job when the weather is so very warm. I don’t

believe I should ever make a very good citizen for this part of the

country.”

“Why not?”

“Because the heat pulls me down so severely.”

“You would soon get accustomed to working in the early morning and late

at night,” Vance replied. “That is the way people do in the tropics.”

“I notice you don’t take kindly to turning out so very early,” Roy

replied as, they having arrived at the tent, he flung himself upon one

of the mattresses.

“But it is most likely I should if I got in the habit of indulging in a

siesta every noon, the same as we saw those fellows at Key West.”

Ned took no part in this conversation. He had followed Roy’s example, so

far as lying down was concerned, but his mind was fully occupied trying

to devise some means for floating the Zoe more quickly than it could be

done by waiting for the tide to pull her off the shore.

It was not many moments before all the party were in a proper mood for

the siesta, which seems so necessary in warm climates, and before either

was aware of the fact, all three were sleeping soundly.

How long this state of happy unconsciousness lasted no one could say;

but all were awakened at the same instant by a repetition of the

horrible groaning which had so disturbed and frightened them on the

previous night.

As if electrified by one common current, the little party sprang to

their feet, and it is no stretch of the imagination to say that Vance’s

teeth were actually chattering from fear.

“We shall be able to learn what it is this time,” Ned said in a whisper

as he stepped cautiously toward the flap of the tent.

“That is, if it’s anything which can be seen,” Roy replied gravely, for

he was beginning to share his cousin’s views as to the supernatural

causes of the blood-curdling sounds.

“Now don’t get as foolish as Vance,” Ned said sharply, and it is just

possible the reproof aided him in controlling his own fears, for even

the boldest could not but have been affected in some degree by the

groans which appeared to come from the immediate vicinity of the tent.

Cautiously the boy who had been marooned stepped from the camp and

looked around.

The sun was beating down upon the glistening sands with quite as much

fervor as he had shown at noon-day, and yet not an animate object was

within sight.

It would have been impossible for the smallest animal to have moved

within the boy’s range of vision and escaped his observation.

But even as he gazed around him the terrible noise was repeated.

“It beats me,” he said as Roy stepped close by his side. “I was looking

in the same direction from which the sound seemed to come, and failed to

see anything.”

“Then perhaps you won’t make so much fun of me after this,” Vance

suggested in a trembling voice as he timidly ventured outside with his

companions. “You can laugh about ghosts as much as you please, but how

else can you account for the noise now, when it is light enough to see

every inch of the island?”

“I’ve always heard it said that ghosts walk, if it is possible for them

to do such a thing, only in the night, and yet this one seems to be

prowling around while the sun is shining. There must be something in the

grove, an’ I’m goin’ to have a thorough look at the place before I’m

willin’ to admit the men we buried can come back to make trouble for

us.”

Ned advanced boldly as he spoke, but his companions did not follow.

It seemed to them as if the tent, frail though it was, might afford some

protection against the unearthly visitant, and they preferred to remain

where it would be possible to beat a retreat if necessary.

Ned did not pause because of being thus abandoned, as it were, but

continued straight on through the underbrush, overturning every fallen

branch, or poking amid the creeping vines in the hope of disturbing the

author of the terrifying noises.

Twice while engaged in this work did he hear the groans, and on each

occasion they sounded as if coming from the rear, much nearer the tent.

“It’s no use to hunt here any longer, for whoever is kicking up the row

must be behind me.”

Now he also was becoming disturbed in mind.

There could be no question but that the unearthly sounds came from that

portion of the key where was not the slightest shelter for man or beast,

and he began slowly to retrace his steps.

While doing so he involuntarily glanced toward the ocean once more, and

noted the fact that it was nearly high water.

“We shall have to haul in on the hawsers pretty soon, an’ I hope that

groanin’ will stop before then, or else it will be impossible to

persuade Vance into lending us a hand.”

With this thought in his mind he walked toward the yacht, and was

standing within thirty feet of her when the noise was repeated, and this

time he distinctly saw the little craft move seaward several inches.

The mystery was explained.

“Hurrah!” he cried with a shout of triumph, and immediately afterward

burst into a loud fit of laughter.

“What is the matter?” Roy asked as he ventured out of the tent once

more, his face several shades whiter than it had been, for this last

groan fully convinced him they were to be haunted by the ghosts of those

who had scuttled the Evening Star.

“I’ve found your spirits, an’ only hope they’ll keep on groanin’, for

then we shall have the yacht afloat just so much the sooner!”

“What do you mean?” and Roy gathered sufficient courage to admit of his

taking a few steps toward where Ned was standing.

“Watch the yacht, an’ you’ll soon find out what the trouble is. It’s

high tide, or will be in half an hour. The hawsers are strainin’ hard,

an’ as she has to slip off the shore there comes a sound as if something

was pulled out of the mud.”

“But there’s no mud here.”

“I know it, yet at the same time that is what causes the noise. She fell

heavy when she struck, and has made a hole in the sand, where, most

likely, the air is confined. Watch five minutes, and then if you’re not

convinced I’ll give my head for a football. Don’t spend any more time

than necessary, however, for we must help the little craft a bit.”

After some difficulty Vance was persuaded to join the committee on

investigation, and while they kept their eyes fixed upon the yacht, Ned

clambered on board by aid of the raft.

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