"And the dog?"

"Has been in the habit of carrying this stick behind his master.
Being a heavy stick the dog has held it tightly by the middle,
and the marks of his teeth are very plainly visible. The dog's
jaw, as shown in the space between these marks, is too broad in
my opinion for a terrier and not broad enough for a mastiff. It
may have been--yes, by Jove, it is a curly-haired spaniel."

He had risen and paced the room as he spoke. Now he halted in
the recess of the window. There was such a ring of conviction
in his voice that I glanced up in surprise.

"My dear fellow, how can you possibly be so sure of that?"

"For the very simple reason that I see the dog himself on our
very door-step, and there is the ring of its owner. Don't move,
I beg you, Watson. He is a professional brother of yours, and
your presence may be of assistance to me. Now is the dramatic
moment of fate, Watson, when you hear a step upon the stair which
is walking into your life, and you know not whether for good or
ill. What does Dr. James Mortimer, the man of science, ask of
Sherlock Holmes, the specialist in crime? Come in!"

The appearance of our visitor was a surprise to me, since I had
expected a typical country practitioner. He was a very tall,
thin man, with a long nose like a beak, which jutted out between
two keen, gray eyes, set closely together and sparkling brightly
from behind a pair of gold-rimmed glasses. He was clad in a
professional but rather slovenly fashion, for his frock-coat was