Holmes called faithful housekeeper Mrs Hudson into his consulting room. Watson stood behind his chair looking serious. Holmes coughed, clearly uncomfortable with what he was about to say. “Mrs Hudson, Watson and I have noticed that the number of biscuits placed upon our saucers at tea time has decreased by thirty-three percent. I am unable to account for this. I see no evidence of you squirrelling away part of the shopping money to spend on gin, fancy clothes or to give to an unsavoury...