He noted, for the first time, the keen alertness and intellectuality of the other's face.

It was a fine strong face, with a pair of luminous grey eyes, a likeable long nose, and clean-shaven, humorous mouth--a man to trust and depend upon.
"I hardly know what to do," said Sir Henry, after a lengthy pause, which he had evidently devoted to considering the wisdom of acceding to his companion's request.

"This gentleman has not consulted me professionally, and I hardly feel justified in confiding my hurried and imperfect diagnosis of his case, without his knowledge, to a perfect stranger.

On the other hand, there are reasons why somebody should know, if we are to help him in his weak state.

Perhaps, sir, if you told me your name----" "Certainly: my name is Colwyn--Grant Colwyn." "You are the famous American detective of that name ?" "You are good enough to say so." "Why not?
Who has not heard of you, and your skill in the unraveling of crime?
There are many people on both sides of the Atlantic who regard you as a public benefactor.