The following true tale is one of the strangest paranormal accounts on record. The boy in the story is now a successful businessman, so I cant give his full name, even though his surname was once recklessly published by a sensational tabloid magazine which mis-reported the incident in the 1990s. The weird episode related here occurred at Allentown, Pennsylvania in the autumn of 1995.
Victorian syringe case for cocaine by Science Museum London. An interesting article on the Addictive History of Medicine is here, mentioning Holmes, of course.