It is quite possible that somewhere in this room, amongst the curios and hidden by stronger scents, is some substance or liquid which may have the effect we see.

It is possible that the patient has taken some drug, and that he may in some sleeping phase have injured himself.

I do not think this is likely; and circumstances, other than those which I have myself been investigating, may prove that this surmise is not correct.

But in the meantime it is possible; and must, till it be disproved, be kept within our purview." Here Sergeant Daw interrupted: "That may be, but if so, we should be able to find the instrument with which the wrist was injured.

There would be marks of blood somewhere." "Exactly so!" said the Doctor, fixing his glasses as though preparing for an argument.