The Baker Street Irregulars Trust, Lilly Library, Indiana University
-- Search the Lilly Library's finding aid for materials from the BSI holdings.
Arthur Conan Doyle Collection, Toronto Public Library
-- See the Collection web page for information on accessing the holdings and for digital items in the "Curator's Showcase." A search box on this site will provide additional listings.
Sherlock Holmes Collection, Marylebone Information Service, London
-- See the web page and additional links for information about the collection and digital exhibits.
The Arthur Conan Doyle Collection Lancelyn Green Bequest, Portsmouth
-- See the web page and additional links for information about the collection, exhibits, and accessing the book collection through the online catalog. A search in the online catalog under the keywords "Richard Lancelyn Green Bequest" will provide additional listings.
The Kittle Collection of Doyleana, Newberry Library, Chicago
-- See the finding aid and additional links for information on the collection. A search in the online catalog under the keywords "kittle collection" will provide additional materials.
The Sub-Librarians Scion of the the Baker Street Irregulars in the American Library Association, list, "Libraries with Sherlock Holmes or Sir Arthur Conan Doyle Collections"
-- A very useful list of additional collections with some active links to additional information.