Miller's brain was humming. Erickson shot the words at him staccato-fashion, as if they were things known from Great Primer days. The young druggist scratched his head.

"You've got me licked," he admitted. "I'm a stranger here, myself."

"Naturally you can't be expected to understand things I've been all my life puzzling about. Simplest way I can explain it is that we are on a train following this immense circular railway.

"When the train reaches the point where it started, it is about to plunge into the past; but this is impossible, because the point where it started is simply the caboose of the train! And that point is always ahead—and behind—the time-train.

"Now, my idea was that with the proper stimulus a man could be thrust across the diameter of this circular railway to a point in his past. Because of the nature of time, he could neither go ahead of the train to meet the future nor could he stand still and let the caboose catch up with him. But—he could detour across the circle and land farther back on the train! And that, my dear Dave, is what you and I and Major have done—almost."

"Almost?" Miller said hoarsely.

Erickson pursed his lips. "We are somewhere partway across the space between present and past. We are living in an instant that can move neither forward nor back. You and I, Dave, and Major—and the Lord knows how many others the world over—have been thrust by my time impulsor onto a timeless beach of eternity. We have been caught in time's backwash. Castaways, you might say."

An objection clamored for attention in Miller's mind.

"But if this is so, where are the rest of them? Where is my wife?"