Hi! My name's Hannah, and I run a blog called a Guide to Deduction. (aguidetodeduction.tumblr.com) I'm collecting outstanding Sherlock fanart for a book which will try to help save Undershaw House (the home of Arthur Conan Doyle). If you give permission for me to use work, it will published with full credit to you and will available to buy from May along with other Sherlock Holmes work in a charitable book. Deadline is March 11th.