Davis smiled expansively and idiotically as he looked across the dinner
table at Nita. Gerrod and Evelyn tried to join in his happiness, but
they were both worried over the ever-increasing threat of the Silver
Menace. The government's tall dykes had proven useless, and even then
there were creeping sheets of the sticky slime expanding over the whole
countryside. Davis and Nita, however, were utterly uninterested in such
things. They gazed upon each other and smiled, and smiled. Evelyn
looked at them indulgently, but Gerrod began to be faintly irritated
at their absorption in each other when the world was threatened with
suffocation under a blanket of slimy horror.
"It is indeed wonderful," he said with a quizzical smile, "that you two
have decided to marry each other, but has it occurred to either of you
that there is quite an important problem confronting the world?"
"Yes," said Davis quite seriously. "Nita's father has to be placated
before we can marry."
"Please!" said Gerrod in a vexed tone. "Please stop looking at each
other for one instant. I know how it feels. Evelyn and I indulge even
at this late date, but for Heaven's sake think of something besides
yourselves for a moment."
"Oh, you mean the silver stuff," said Nita casually. "Daddy has offered
a huge reward to any one who can fight it successfully. He and half a
dozen other steamship men put together and made up a purse. About two
millions, I believe."
Davis was looking at her, paying but little attention to what she was
saying, simply absorbed in looking. Gerrod saw his expression.
"Don't you _ever_ use your head?" he demanded. "Here you are worrying
about Nita's father, and there you have a reward offered that would
clear away all his objections at once."
"Why--why, that's an idea!" said Davis.
"Glad you think so," said Gerrod acridly. "Suppose you two talk things
over. You have a brain, Davis, even if you rarely use it."
Davis laughed good-naturedly.
After dinner Evelyn and her husband retired to the laboratory again.
Neither of them wanted to waste any time that might be useful in
developing a means of fighting the Silver Menace. They were deep in
their work when Davis and Nita rushed in upon them.
"We've got it!" said Davis dramatically.
Nita was clinging to his arm, and looked immensely proud of him.
"What have you?" asked Gerrod practically.
"A way to clear off the Silver Menace," said Davis. "You know the
animalcules have very fragile little shells. In the war we had to
fight submarines with armored shells. We got the subs with depth bombs
dropped near them. The concussion smashed them up. Now let's take bombs
and drop them in the silver sea. The concussion will wreck the little
shells for miles around."
Gerrod thought the idea, over carefully.
"It might turn the trick," he said thoughtfully.
Davis beamed.
"We'll try it at once," he said enthusiastically. "Or, rather, we'll
start first thing in the morning. We must have light to experiment by.
I'll phone the aviation field at once to have the big plane ready."
"I'm going, too," said Nita determinedly.
"We'll all go," said Davis expansively.
The plane left the ground shortly after daybreak. It was a curious
sight to see the absolutely cloudless sunrise. The sky paled to the
east, then glowed fiercely red, lightened to orange and the sun rolled
up above the horizon. The big airship circled grandly until it had
reached a height of nearly ten thousand feet, then swung for the east
and sped away.
Nita sat in the seat beside the pilot, her face flushed with
excitement. Gerrod and Evelyn occupied seats farther back, and the
single engineer leaned against the rear of the car, where he could
keep both ears open to the roar of his engines. The twin bomb racks
along the outside of the car were filled with long, pear-shaped,
high-explosive missiles, and the electric releasing switches were close
beside Davis' hand. A case of hand grenades was carefully packed in the
car, too.
The plane passed over green fields far below, with strangely still
and shining streams and rivers winding in and out. From the banks
of most of those streams glistening blankets of a silvery texture
spread slowly and inexorably over the surrounding fields. Before them
they saw what appeared to be the end of the world. Green fields and
luxuriantly foliated forests gave place to a field of shining silver,
which undulated and clumsily followed the conformation of the land and
objects it had overwhelmed. Here one saw ungainly humps that seemed
made of burnished metal. The rounded contours told that great trees
had succumbed to the viscid mass of animalcules. There was a group of
more angular forms with gaping black orifices in their glittering sides
told of a village that had been abandoned to the creeping horror. The
open windows of the houses yawned black and amazed, though now and then
thick stalactites hung pendulously across their openings.
Above all these the big plane sped. It swept on toward the open sea--or
what had been the open sea until the Silver Menace had appeared. Soon
the shore was left behind, and the huge aëroplane was flying between
the two skies--the real sky above and the reflected sky below. Only
a thin line from far inland showed dark. All the rest seemed but a
universe of air without a horizon or any sign of tangibility. Davis
kept his eyes on his instruments, and presently announced:
"I think we're far enough out. We'll drop our first bomb here."
He pressed the release switch as he spoke. The plane lifted a little
as the heavy bomb dropped. For a few seconds there was no sound but
the roaring of the motors, but then the reverberation of the explosion
below reached them.
"Take a look below," said Davis, banking the machine sharply and
beginning to swing in a narrow circle.
Gerrod looked down. He saw what seemed to be a ring of yellowish smoke,
and a dark-blue spot in the middle of the silvery mass beneath them.
"It did something," he reported, "There's a dark spot on the surface. I
can't judge how large it is, though."
Davis released a second bomb, and a third. Gerrod could watch them as
they fell. They dwindled from winged, pear-shaped objects to dots. Then
there was a flash far below and a spurting of water and spray. In a
moment that had subsided, and he saw a second and larger dark-blue spot
beside the first.
"I believe you've done it," said Gerrod excitedly. "You've certainly
destroyed the silvery appearance. Dare you go lower?"
"Surely," said Davis cheerfully. The plane dived like an arrow, and
flattened out barely five hundred feet above the surface.
Gerrod examined the dark spots through glasses. The disturbance had not
completely abated, and he could see indubitable waves still radiating
from the Spot where the bombs had fallen. Davis grinned like a boy when
Gerrod told him.
"We'll land in the open space and make sure," he said suddenly, and the
plane dived again.
Before Gerrod could protest they were just skimming the surface of
the silver sea. The plane settled gently into the now liquid spot of
ocean, and Davis shut off the motors. The occupants of the cabin looked
eagerly out of the windows. All about them, in a space perhaps sixty
or seventy yards across, the water was yellowed and oily, but was
certainly water, and not the horrible, jellylike stuff the world had
so much cause to fear. The concussion from the high-explosive bomb had
shattered the fragile shells of the silver animalcules, and, with their
protection gone, they had relapsed into liquid. At the edge of that
space, however, the silver-sea began again, as placid and malignant as
before.
The plane floated lightly on the surface while the little party
congratulated itself.
"It works," said Davis proudly. Nita squeezed his hand ecstatically.
"I knew he'd think of something," she announced cheerfully.
Evelyn and Gerrod were estimating the area of cleared water with
gradually lengthening faces.
"Let's see how much space a hand grenade clears," suggested Evelyn
thoughtfully.
Davis opened the case and took out one of the wicked little bombs. He
wriggled through a window and out on the massive lower plane of the
flying boat. Balancing himself carefully, he flung the grenade some
sixty yards into the untouched silver sea. It burst with a cracking
detonation and amid a fountain of spume and spray. The four of them
eyed the resultant area of clear water.
"How wide do you suppose that is?" asked Gerrod rather depressedly.
"Ten--no, fifteen yards by fifteen."
So excited were they all that they did not notice a phenomenon that
began almost instantly. The tiny animalcules that formed the silver
sea reproduced rapidly when given merely moisture. Here they had that
moisture, and, in addition, the bodies of all their dead comrades
to feed upon. The conditions were ideal for nearly instantaneous
reproduction. As a result the waves from the high-explosive bombs had
hardly subsided when the open space began, almost imperceptibly, to be
closed by fresh masses of the Silver Menace. The open space became
covered with a thin film which became thicker--thicker----
"And how much explosive was in that grenade?"
"Two ounces of TNT." Davis began to catch the drift of the questions,
and his happy expression was beginning to fade away.
"Two ounces of TNT cleared up roughly a hundred and fifty square yards
of silver sea. That's, say, seventy-five square yards to the ounce of
high explosive." Evelyn was working rapidly with her pencil. "That
works out--five hundred pounds of TNT needed to clear a square mile of
the Silver Menace. We have fifteen hundred miles of coast that has been
invaded to an average depth of at least five miles."
Gerrod took up the calculations with a dismal face. His pencil moved
quickly for a moment or so.
"We'd need over eighteen hundred tons of TNT to clear our coasts," he
said dolefully. "That wouldn't touch the silver sea itself or keep it
from growing again. It grew inland those five miles in two weeks at
most. That's nine hundred tons a week needed to hold our own without
attacking the silver sea at all. We'd have to have forty-six thousand
tons a year to _hold_ it, let alone go after the beasts out here, and
in the meantime we'll have no rain, consequently no crops. It's a
cheerful outlook."
They had been oblivious of what was happening immediately about the
seaplane.
Nita first saw the danger.
"Look!" she gasped.
They had been too much absorbed in gloomy thoughts to notice their
predicament. The open space in which they had landed was now a shining,
glittering mass of the Silver Menace. But what Nita pointed to was of
more imminent danger. The sticky, horrible mass was creeping up the
float on which the seaplane rode and up the smaller floats at the ends
of the wings. Tons of the silver horror had already accumulated upon
the under surface of the great planes and weighted down the aëroplane
until it was impossible for it to rise in the air. And it continued to
creep up and over the body. In a little while the seaplane would be
overwhelmed by the viscid, evil-smelling, deadly little animalcules.