"Have you searched the premises?"
"From cellar to garret."—
"And discovered nothing?"
"Nothing."
"What of the panel?"
"It defies our combined efforts."
"Strange, indeed."
Basil strode to the wall and struck the spot indicated by Tristan with the hilt of his poniard. Then he tested the wall on either side.
"Can your ear detect any difference in sound?"
A negative gesture came in response, and with it a puzzled look passed into Tristan's eyes.