Sherlock Holmes - The Devil's Dust

It is 1884, and when a fellow landlady finds her lodger poisoned, Mrs Hudson turns to Sherlock Holmes.

The police suspect the landlady of murder, but Mrs Hudson insists that her friend is innocent. Upon investigating, the companions discover that the lodger, a civil servant recently returned from India, was living in almost complete seclusion, and that his last act was to scrawl a mysterious message on a scrap of paper. The riddles pile up as aged big game hunter Allan Quatermain is spotted ...