She turned pale, and yet she ought to have expected it.

“You don’t mean——” she began.

“But I do, though. Which is your room, madam?”

She told me.

It was close to the door of that room that I met Mr. Opdyke with his cigars.

Mrs. Welton took my advice.

“I’ll wait for you at the foot of the stairs,” I whispered.

In a moment she came back, looking paler still.

“Every diamond has been taken,” she whispered, excitedly, “and you know the thief?”

“Pardon me, madam; I only suspect.”