Holograph letter to an unknown recipient
December 10, 1913
Throughout his life, Conan Doyle did his writing with a pen. A few years into the new century, he began having his holograph manuscripts professionally typed, sending typescripts to his publishers and retaining the loose sheets or student exercise notebooks in which he most often wrote his stories. As manuscripts piled up, an unknown correspondent planted an idea for turning them to good use, and Conan Doyle acted on this with enthusiasm.
On Crowborough stationery