.

.

They were traversing at this moment, no doubt, only a thousand feet high, one of those passes up which (he thought he remembered from history) the old railway-trains had been accustomed to climb, yard by yard and spiral by spiral, a hundred years before.

.

.
In a minute or two he leaned forward and stared again, once more closing the curtains behind his head.
The sky seemed a little brighter, he thought, than when he had looked just now.