The Absence of Holmes : The Continuation of the Mormon Subplot in 'Angels of Darkness'
ACD : Journal of the Arthur Conan Doyle Society
States some of the sources that Doyle relied on to write 'A Study in Scarlet'. It discribes characters in 'A Study in Scarlet' and explains the Mormon subplot in the book. It also talks about Doyle's tendencies to lean towards Spiritualism in response to Mormonism.