h dimension, sir," said the servant.

"That's not the fourth dimension," the old man corrected him. "That's a
third-dimensional impression of the fourth dimension. It is no more the
fourth dimension than a shadow is three-dimensional. It, like a shadow,
is merely a projection. It gives us a glimpse of what the fourth plane
is like. It is a shadow of that plane."

Slowly a dark blotch began to grow in the landscape. Slowly it assumed
definite form. It puzzled the reporter. It looked familiar. He could
have sworn he had seen it somewhere before. It was alive, for it had
moved.

"That, sir, is the dog," George volunteered.

"That was the dog," Dr. White again corrected him. "God knows what it is
now."

He turned to the newspaperman.

"Have you seen enough?" he demanded.

Henry nodded.

The other slowly began to return the lever to its original position.
The roaring subsided, the light faded, the projection in the half-globe
grew fainter.

"How are you going to use it?" asked the newspaperman.

"I have ninety-eight men who have agreed to be projected into the fourth
dimension to seek out the entities that are attacking us and attack them
in turn. I shall send them out in an hour."

"Where is there a phone?" asked the newspaperman.

"In the next room," replied Dr. White.

As the reporter dashed out of the door, the light faded entirely from
between the two disks and on the lower one a little dog crouched,
quivering, softly whimpering.

* * * * *

The old man stepped from the controls and approached the disk. He
scooped the little animal from where it lay into his arms and patted the
silky head.

"Good dog," he murmured; and the creature snuggled close to him,
comforted, already forgetting that horrible place from which it had just
returned.

"Is everything ready, George?" asked the old man.

"Yes, sir," replied the servant. "The men are all ready, even anxious to
go. If you ask me, sir, they are a tough lot."

"They are as brave a group of men as ever graced the Earth," replied the
scientist gently. "They are adventurers, every one of whom has faced
danger and will not shrink from it. They are born fighters. My one
regret is that I have not been able to secure more like them. A thousand
men such as they should be able to conquer any opponent. It was
impossible. The others were poor soft fools. They laughed in my face.
They thought I was an old fool--I, the man who alon