“There seems to me to be a singular unanimity of purpose existing between these two men,” I said; “not only as regards the subject-matter of their reading, but in no less than six cases they have both perused the same volume. This never happened by chance. Clearly, they are acquaintances, and are working together toward some common end. I should think it very likely, judging from their interest in cancers and toxicology, that they were medical students. Numbers four and five don’t exactly seem to strengthen my medical hypothesis, but they are only two out of the ten. That’s about all I can make out of it;” and I returned the list to him.
“Your views in the matter,” replied Maitland, “are precisely those which first occurred to me, and I am not sure but I should still hold them, had I been
