Did Sherlock Holmes Have a Dark Secret?

The Dark Secret of Sherlock Holmes
The Eval Nature of Sherlock Holmes
Did Sherlock Holmes have a dark secret? Sherlock Holmes was "...beating the subjects in the dissecting rooms with a stick to verify how far bruises may be produced after death. I saw him at it with my own eyes." A Study in Scarlet. Arthur Conan Doyle. 7:1887. Vivisectionist with a passion for pain-staking knowledge.