Board Thread:General Discussion/@comment-226878-20150710200046/@comment-70.27.67.203-20151118235646

Yes, he was. See "The Adventure of Charles Augustus Milverton", "The Man with the Twisted Lip", "The Adventure of the Empty House" and "A Scandal in Bohemia". He fooled Watson. He was a fine actor too, and Watsom mourns the loss to the stage when Sherlock chose detective work over acting. Yeah, a good candidate for a spy. Total mental brilliance and chemical knowledge aside, though they can't hurt too.