"It is in some such home," he continued with an ease that should have warned me he had started on this pursuit with a quiet determination to win, "that the clue will be found to the mystery we are considering. Yes, you may well look startled, but that conclusion is the one thing I brought away with me from—X., let us say. I regard it as one of some moment. What do you think of it?"

"Well," I admitted, "it makes me feel like recalling that pish I uttered a few minutes ago. It would take a woman of uncommon characteristics to assist you in this matter."

"I am glad we have got that far," said he.

"A lady," I went on.

"Most assuredly a lady."

I paused. Sometimes discreet silence is more sarcastic than speech.

"Well, what lady would lend herself to this scheme?" I demanded at last.

The tap, tap of his fingers on the rim of his glasses was my only answer.

"I do not know of any," said I.

His eyebrows rose perhaps a hair's-breadth, but I noted the implied sarcasm, and for an instant forgot my dignity.