“I don’t follow you at all,” said I. “That a man should hang upon his wall an inscription that is legible to him does not seem to me at all out of the way. It would be much more singular if he should hang up an inscription that he could not read.”

“No doubt,” replied Thorndyke. “But you will agree with me that it would be still more singular if a man should hang upon his wall an inscription that he could read⁠—and hang it upside down.”

I stared at Thorndyke in amazement.

“Do you mean to tell me,” I exclaimed, “that that photograph is really upside down?”

“I do indeed,” he replied.

“But how do you know? Have we here yet another Oriental scholar?”