The boy was certain he was jesting until he saw the expression of his face.

'Surely, Baldy, it is not as bad as that?'

'Do you see that ar?' demanded the trapper, pointing toward the wall, which the youngster could not help observing.

'How comes that to be there?'

'The red-skins put it thar. Can yer steam man walk over that?'

'Certainly not; but we can remove them.'

'Do yer want to try it, younker?'

'I'm willing to help.'

'Do yer know that ar' somethin' less nor a hundred red-skins ahind them, jist waitin' fur yer to try that thing?'

'Good heavens! can it be possible?'