Pursuit to Algiers (1945) is the twelfth entry in the Basil Rathbone/Nigel Bruce Sherlock Holmes film series of fourteen. Elements in the story pay homage to an otherwise unrecorded affair mentioned by Dr. Watson at the beginning of the 1903 story "The Adventure of the Norwood Builder", notably the steamship Friesland. Off-camera, Watson also recounts to his audience another unrecorded affair mentioned in the 1924 story "The Adventure of the Sussex Vampire", that of the Giant Rat of Sumatra, "a story for which the world is not yet prepared".