Criminal Investigation Department that we could get. So I sent a note
asking to have Sergeant Daw sent at once. You remember him, sir, in
that American poisoning case at Hoxton."

"Oh yes," I said, "I remember him well; in that and other cases, for I
have benefited several times by his skill and acumen. He has a mind
that works as truly as any that I know. When I have been for the
defence, and believed my man was innocent, I was glad to have him
against us!"

"That is high praise, sir!" said the Superintendent gratified: "I am
glad you approve of my choice; that I did well in sending for him."

I answered heartily:

"Could not be better. I do not doubt that between you we shall get at
the facts--and what lies behind them!"

We ascended to Mr. Trelawny's room, where we found everything exactly as
his daughter had described.

There came a ring at the house bell, and a minute later a man was shown
into the room. A young man with aquiline features, keen grey eyes, and
a forehead that stood out square and broad as that of a thinker. In his
hand he had a black bag which he at once opened. Miss Trelawny
introduced us: "Doctor Winchester, Mr. Ross, Superintendent Dolan." We
bowed mutually, and he, without a moment's delay, began his work. We
all waited, and eagerly watched him as he proceeded to dress the wound.
As he went on he turned now and again to call the Superintendent's
attention to some point about the wound, the latter proceeding to enter