The missing boy in Sherlock Holmes’s “The Adventure of the Priory School” is Lord Saltire.
The story was written by Arthur Conan Doyle and first published in 1904. Lord Saltire, the son of the Duke of Holdernesse, disappears from the Priory School in northern England along with a German master named Heidegger.
Holmes travels to the school with Dr Watson and examines tracks across the moor. The case depends heavily on physical evidence, including bicycle tracks, footprints, and marks left by a pony. These details allow Holmes to reconstruct the route taken after the disappearance.
The case is sometimes confused with other Holmes stories involving aristocratic children or missing heirs. Lord Saltire is the boy’s title and name used in the story; he is not Lord St Simon, the nobleman from “The Adventure of the Noble Bachelor.”