Arthur Conan Doyle (2007). “The New Annotated Sherlock Holmes: The Complete Short Stories: The Return of Sherlock Holmes, His Last Bow and The Case-Book of Sherlock Holmes (Non-slipcased Edition) (Vol. 2) (The Annotated Books)”, p.1443, W. W. Norton & Company
Loretta Chase, Anna Campbell (2014). “Regency Rogues and Rakes: Silk is for Seduction / Scandal Wears Satin / Vixen in Velvet / Seven Nights in a Rogue's Bed / A Rake's Midnight Kiss / What a Duke Dares (Mills & Boon e-Book Collections)”, p.157, HarperCollins UK