From The Arthur Conan Doyle Encyclopedia
This list only shows the illustrators between 1881 (the first illustrations of Arthur Conan Doyle's work) and 1930 (when Conan Doyle died).
Note that a lot of early illustrators are anonymous or unknown so this list can't be considered as exhaustive. See each works individually to see all illustrations, when available.
Illustrators with a * have illustrated Sherlock Holmes stories. Dates in parenthesis are the publication period.