"The Adventure of the Noble Bachelor" is a Sherlock Holmes short story by Sir Arthur Conan Doyle, first published in The Strand Magazine in April 1892 and included in The Adventures of Sherlock Holmes. The case involves the sudden disappearance of Hatty Doran, the American bride of Lord Robert St. Simon, on the day of their wedding. When conventional investigation yields little, Holmes is called upon to unravel the mystery behind her vanishing, which appears linked to events from her past. The story explores themes of class, transatlantic marriages, and mistaken assumptions.