from another, much less to tell whether any of them had been made
by the perpetrators of the crime.

Still, there seemed to be something in the mud, just off the side
of the road, that did interest Garrick. Very carefully, so as not
to destroy anything himself which more careless searchers might
have left, he began a minute study of the ground.

Apparently he was rewarded, for, although he said nothing, he took
a hasty glance at the direction of the sun, up-ended the camera he
had brought, and began to photograph the ground itself, or rather
some curious marks on it which I could barely distinguish.

The coroner and I looked on without saying a word. He, at least, I
am sure, thought that Garrick had suddenly taken leave of his
senses.

That concluded Garrick's investigation, and, after thanking the
coroner, who had gone out of his way to accommodate us, we started
back to town.

"Well," I remarked, as we settled ourselves for the tedious ride
into the city in the suburban train, "we don't seem to have added
much to the sum of human knowledge by this trip."

"Oh, yes, we have," he returned, almost cheerfully, patting the
black camera which he had folded and slipped into his pocket.
"We'll just preserve the records which I have here. Did you notice
what it was that I photographed?"