"The Adventure of the Musgrave Ritual" is a short story by Arthur Conan Doyle, featuring his fictional detective Sherlock Holmes.

"The Adventure of the Musgrave Ritual" shares elements with two Edgar Allan Poe tales: "The Gold-Bug" and "The Cask of Amontillado".

[3] "The Musgrave Ritual" is a short story from The Memoirs of Sherlock Holmes, written by Arthur Conan Doyle.

Musgrave, a member of an aristocratic family, comes to Holmes for help regarding a strange and troubling event at his ancestral estate in Sussex.

Additionally, a maid named Rachel Howells, who had been romantically involved with Brunton, was acting strangely and later vanished as well.

Using the positioning of the sun and trees, Holmes follows the instructions and discovers a hidden chamber beneath the floor of an old storeroom.

Holmes deduces that Brunton had deciphered the ritual and found the location of the treasure but had enlisted Rachel’s help to move a heavy stone slab.

The treasure turned out to be a centuries-old crown belonging to King Charles I, hidden by an ancestor of the Musgrave family during the English Civil War.

This story highlights Holmes’s brilliant deduction skills, his ability to interpret historical clues, and his methodical approach to solving mysteries.

The story was adapted for the 1954 television series, Sherlock Holmes, there titled "The Case of the Greystone Inscription".

[12] The story was adapted for an episode of Sherlock Holmes, the Granada Television series starring Jeremy Brett.

In the Granada film version, however, Holmes utilizes a weathervane in the shape of an oak perched on top of the Musgrave mansion to solve the mysterious ritual.

[13] Episodes 9 and 10 of the 2013 Russian TV series Sherlock Holmes are based on the story, although the storyline is quite different including some action scenes and Brunton being in fact a revenging member of a family of Musgraves' rivals.

Years later, with John Watson's life at stake as he is trapped in the same location where Eurus left her first victim, Sherlock deduces that the song relates to the unusual dates on various fake gravestones around the house, the resulting 'code' leading him to Eurus' old room to make an emotional appeal to his sister to spare John.

[16] An adaptation aired on BBC radio in June 1978, starring Barry Foster as Holmes and David Buck as Watson.

[17] "The Musgrave Ritual" was adapted as a 1981 episode of the series CBS Radio Mystery Theater with Gordon Gould as Sherlock Holmes and Court Benson as Dr.

[20] T. S. Eliot stated that he adapted part of the Ritual in his 1935 verse play Murder in the Cathedral as a deliberate homage.