y you knew that the room would be empty when he was out of it, no
matter who remained. Not that Brown was such a big, broad-shouldered,
dominating figure of a man. He was so tall and thin of figure that he
looked almost gaunt, and so spare and dark of face that he appeared
almost austere. Yet when you observed him closely he did not seem really
austere, for out of his eyes, of a clear, deep gray, looked not only
power but sympathy, and not only patience but humour. His mouth was
clean-cut and strong, and it could smile in a rather wonderful way. As to
the years he had spent--they might have been thirty, or forty, or twenty,
according to the hour in which one met him. As a matter of fact he was,
at the beginning of this history, not very far along in the thirties,
though when that rather wonderful smile of his was not in evidence one
might have taken him for somewhat older.

I had forgotten. Besides Brown when he was in the study there was
usually, also, Bim. Also long and lean, also brown, with a rough, shaggy
coat and the suggestion of collie blood about him--though he was plainly
a mixture of several breeds--Bim belonged to Brown, and to Brown's
immediate environment, whenever Bim himself was able to accomplish it.
When he was not able he was accustomed to wait patiently outside the door
of Brown's small bachelor abode. This door opened directly from the
street into the Brown Study.

The really curious thing about the study was that nobody in that quarter
of the big city knew it was a study. They called the place simply
"_Brown's_." Who Brown himself was they did not know, either. He had
come to live in the little old house about a year ago. He was dressed so
plainly, and everything about him, including his manner, was of such an
unobtrusive simplicity, that he attracted little attention--at first.
Soon his immediate neighbours were on terms of interested
acquaintanceship with him, though how they got there they could not
themselves have told--it had never occurred to them to wonder. The thing
had come about naturally, somehow. Presently others besides his immediate
neighbours knew Brown, had become friends of Brown. They never wondered
how it had happened.

The Brown Study had many callers. It was by now thoroughly used to them,
for it had all sorts, every day of the month, at any hour of the day, at
almost any hour of the night.

II

BROWN'S CALLER--ONE OF MANY

A caller had just come stumbling in out