The Sign of The Four Quote by Sir Arthur Conan Doyle

"Here is my monograph upon the tracing of footsteps, with some remarks upon the uses of plaster of Paris as a preserver of impresses. Here, too, is a curious little work upon the influence of a trade upon the form of the hand, with lithotypes of the hands of slaters, sailors, corkcutters, compositors, weavers, and diamond-polishers. That is a matter of great practical interest to the scientific detective,--especially in cases of unclaimed bodies, or in discovering the antecedents of criminals. But I weary you with my hobby." ~ The Sign of The Four