There was one period of more than half an hour when he lost the fugitive entirely.

He wandered up to the second floor and then back again.

There, in a room that had been the library, he caught a glimpse of the man.

But the figure was so shadowy that he could tell nothing about him.
"Halt!" cried Dick, snatching out his pistol.

But when he leveled it there was nothing to aim at.