ersities 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.

"It depends upon those cigarettes that I smoked," said he. "It is
possible that I am utterly mistaken. The cigarettes will show me."

"My dear Holmes," I exclaimed, "how on earth----"

"Well, well, you may see for yourself. If not, there's no harm done. Of
course, we always have the optician clue to fall back upon, but I take
a short cut when I can get it. Ah, here is the good Mrs. Marker! Let us
enjoy five minutes of instructive conversation with her."

I may have remarked before that Holmes had, when he liked, a peculiarly
ingratiating way with women, and that he very readily established terms
of confidence with them. In half the time which he had named, he had
captured the housekeeper's goodwill and was chatting with her as if he
had known her for years.

"Yes, Mr. Holmes, it is as you say, sir. He does smoke something
terrible. All day and sometimes all night, sir. I've seen that room of
a morning--well, sir, you'd have thought it was a London fog. Poor young
Mr. Smith, he was a smoker also, but not as bad as the professor. His
health--well, I don't know that it's better nor worse for the smoking."

"Ah!" said Holmes, "but it kills the appetite."

"Well, I don't know about that, sir."

"I suppose the professor eats hardly anything?"

"Well, he is variable. I'll say that for him."

"I'll wager he took no breakfast this morning, and won't face his lunch
after all the cigarettes I saw him consume."

"Well, you're out there, sir, as it happens, for he ate a remarkable big
breakfast this morning. I don't know when I've known him make a
better one, and he's ordered a good dish of cutlets for his lunch. I'm
surprised myself, for since I came into that roo