When searching through Conan Doyle’s papers, Hesketh Pearson, a biographer of his, came across a plan for an unwritten story. As Richard Lancelyn Green notes, there is no evidence to show that it is by [Conan Doyle] and strong internal evidence to suggest that it's. Various authors have attempted to complete the story (named The Adventure of the Tall Man by Peter Haining) and put it alongside the canon. Some are very close to Doyle’s plot, others including variations. However no official completion has been made.

Narrator: Peter Coates
Listening Length: 04 minute 50 seconds