The Melancholy Methodist
The Art of Sherlock Holmes #34 - The Melancholy Methodist

Artist - Olivier Lamboray (link to artists site)
Author - Mark Mower (link to author profile)
Special Edition Prints - Conan Doyle Estate Shop (link to shop)
Metal Prints - Displate (link to shop)
Prints, Greetings Cards, Notebooks, etc - Redbubble (link to shop)

Olivier's art appears in the book The Art of Sherlock Holmes Global Edition 1