They talked in German and he could not understand them, but he noticed particularly; that the two who went into the pit to gather the more valuable portion of the paraphernalia appeared not to be familiar with the place, and he thought that the officer inquired of them whether there were two or more guns.
When he lifted his share of the burden, Roscoe noticed how he watched the officer with a kind of apprehension, almost terror, in his furtive glance, and kept his eyes upon him as they started away in the darkness.
Roscoe was in a mood to think ill of Tom, whom he considered the bungling, stubborn author of their predicament.

It pleased him now to believe that Tom was afraid and losing his nerve.

He remembered that he had said they would be crucified as a result of Tom's pin-headed error.
And he was rather glad to believe that Tom was thinking of that now..