Mouse clickHEREto access the full interactive map. The map legend, on the left side of the map, can be closed by clicking on its vertical three-dot symbol. Then, a click on one of the map's walking men will display an illustrated text box explaining the significance of that place.
The Mapped London of Sherlock Holmes e-book (Amazon.com, $5.99) allows you to explore Sherlock Holmes's London on your tablet or computer, with a custom map. In addition, the book has addresses for your smart phone's GPS App, and computer generated photographs of London's 400 Sherlock Holmes sites. The game is afoot!