“Nothing that would help a thief. Family papers, letters from my poor wife, diplomas of universities which have done me honour. Here is the key. You can look for yourself.”

Holmes picked up the key, and looked at it for an instant, then he handed it back.

“No, I hardly think that it would help me,” said he. “I should prefer to go quietly down to your garden, and turn the whole matter over in my head. There is something to be said for the theory of suicide which you have put forward. We must apologize for having intruded upon you, Professor Coram, and I promise that we won’t disturb you until after lunch. At two o’clock we will come again, and report to you anything which may have happened in the interval.”

Holmes was curiously distrait, and we walked up and down the garden path for some time in silence.

“Have you a clue?” I asked, at last.