“I don’t know that, sor.”

Frank was puzzled.

The voice of the Celt seemed to be within a few yards of him, and yet was dull and muffled.

It occurred to Frank of a sudden that Barney had wandered into a parallel passage and was now opposite him, beyond a thick wall of stone.

Satisfied of this, Frank said:

“I thought you were right behind me, Barney.”

“Shure, so I was.”

“But you are in another passage. You must have deviated back here a ways.”

“Very loikely, sor. Pwhat shall I do about it?”

“Why, go back, of course, and get into the right passage and come along with me.”