an incentive to reconstruct upon a greater scale. But the men
of 4,000 A.D. could not do that....

At the year 10,000 A.D., with a seemingly primeval forest around us,
Tina, Larry and I held an anxious consultation. We had anticipated
that Tugh would stop in his own Time-world. That might have been
around 3,000 or 4,000; but we hardly thought, as we viewed the scene
in passing, that he had come originally from beyond 4,000. He was too
civilized.

Tugh had not stopped. He had to be still ahead of us, so our course
was to follow. Whenever he stopped, we would see him. If he turned
back and flashed past us, that too would be evident. But if, from
2,930, he had gone into the past--!

* * * * *

And then suddenly we glimpsed the other cage! It was ahead of us,
traveling more slowly and retarding as though about to stop. A gray
unbroken forest was here. The time was about 12,000 A.D. Tina saw it
first through the little telescopic-barrel; then it showed on the
mirror-grid--a faint, ghostly-barred shape, thin as gossamer. We even
saw it presently through the window. It held its steady position,
level with us, hanging solid amid the melting, changing gray outlines
of the forest trees. They blurred it as they rose and fell.

This chase through Time! The two cages sped forward with the gray
panorama whirling around them. Of all the scene, only that other cage,
to us, was real. Yet it was the cages which were apparitions.

We gathered at our eastward window to gaze across the void of that
five hundred feet. The interior of Tugh's cage was not visible to us.
A little window--a thinner patch in the lattices of the
cage-side--fronted us; but nothing showed in it.

We were so helpless! Only five hundred feet away, the Tugh cage was
there--now; yet we could do nothing save hold our Time-changing rate
to conform with it. Of course Tugh saw us. He was making no effort to
elude us, for neither cage was running at its maximum.

For hours I stood gazing, praying that Mary might be safe, striving
with futile fancy to guess what might be transpiring within that cage
speeding side by side with us in the blurred shadows of the corridors
of Time.

And again, as so many times before, I was balked at guessing Tugh's
motives for his actions. He knew we could not assail him unless he
stopped. But to what destination was he going?

* * * * *

It was a chase--to our consciousn