It seemed to him that their army was about to enter some vast, illimitable space, swarming with unknown enemies.

He felt for a little while a deep depression.

But it was partly physical.

His exertions of the day had been tremendous, and the intense excitement, too, had almost overcome him.

The watchful Dalton noticed his condition, and wisely said nothing, allowing his pulses to regain their normal beat.
It was nearly an hour before his nerves became quiet, and then he sank into a heavy sleep.