Gus Bofa
From The Arthur Conan Doyle Encyclopedia

Gustave Henri Émile Blanchot aka "Gus Bofa" (23 may 1883 - 1 september 1968) was a French illustrator and writer.
Circa 1920-1923, he did 5 illustrations for Arthur Conan Doyle's fictions published by L'Édition Française Illustrée.
These same cover illustrations were used for different volumes. Note that one of the illustrations shows a character disguised as Sherlock Holmes but was not used to illustrate a Sherlock Holmes volume, but for The Doings of Raffles Haw / The Retirement of Signor Lambert.
Illustrations
ca. 1920-1923
All these illustrations were used as cover image by L'Édition Française Illustrée between 1920-1923.
- Jim Harrison, boxeur ((Rodney Stone)
- Les Recrues de Montmouth (Micah Clarke 1/3)
- Le Capitaine Micah Clarke (Micah Clarke 2/3)
- La Bataille de Sedgemoor (Micah Clarke 3/3)
- Un début en médecine (The Stark Munro Letters)
- Un Duo (A Duet, with an Occasional Chorus)
- Une idylle de banlieue (Beyond the City)
- Mystères et Aventures (Mysteries and Adventures)
- Nouveaux Mystères et Aventures (New Mysteries and Adventures)
- Derniers Mystères et Aventures (Last Mysteries and Adventures)
- La Grande Ombre (The Great Shadow)
- Le Parasite (The Parasite and other stories)
- La Merveilleuse découverte de Raffles Haw (The Doings of Raffles Haw + The Retirement of Signor Lambert)