Cosmetics and Beauty (specifically the last two paragraphs)
http://www.victorianlondon.org/
http://www.bbc.co.uk/history/british/victorians/
http://www.bbc.co.uk/schools/primaryhistory/victorian_britain/
Official website for Sir Arthur Conan Doyle Literary Estate: http://www.sherlockholmesonline.org/
The Arthur Conan Doyle Society: http://www.ash-tree.bc.ca/acdsocy.html
The Chronicles of Sir Arthur Conan Doyle: http://www.siracd.com/