Holmes tells Watson that if he's wrong about the pearl's hiding place, "I shall retire to Sussex and keep bees." In the original Holmes stories, this is exactly what he does upon retirement.

For some curious reason Holmes' cluttered Baker Street apartment has a photograph of a beardless Abraham Lincoln.

Shooting lasted from April 11-May 1, 1944, released September 22.

The ninth of fourteen films based on Arthur Conan Doyle's fictional consulting detective Sherlock Holmes starring Basil Rathbone as Sherlock Holmes and Nigel Bruce as Doctor Watson.

References Sir Arthur Conan Doyle's original Sherlock Holmes story, 'The Adventure of the Six Napoleons'.

One of the first modern-day Sherlock Holmes films starring Basil Rathbone and Nigel Bruce which did not feature Nazis or Nazi sympathizers as villains, and which made no reference to them.

Rondo Hatton would play a different CREEPER in two follow-ups not related to this film, "House of Horrors" and "The Brute Man, " both completed in 1945, but released following Hatton's death, which occurred on February 2, 1946.

The character of the Creeper - played by Rondo Hatton - would be paid a fond tribute many years later in the film "The Rocketeer."

"The Pearl of Death" includes a scene where Sherlock Holmes kills someone. Such moments hardly occurred in the Basil Rathbone films.

The leading villain Miles Mander only lived another two years after this film was released.

Watson makes a misstatement. When Giles Conover leaves a book for Holmes, he tells Dr. Watson it is an early folio of Dr. Johnson's Dictionary. Shortly after, Watson tells Holmes it is a first folio.

The story takes place in England, of course, and the English are famous for their fondness for tea and therefore the produce enormous numbers of teapots of all qualities. There is no need for the British to import teapots from other countries. However, two obviously American-made teapots are seen in the film. When arch-criminal Giles Conover is in prison, his breakfast or lunch tray is examined by Inspector Lestrade who suspects Conover of smuggling a message out of his cell somewhere on his tray. The teapot on the tray is an American teapot made by Hall China of East Liverpool, Ohio. Popular with collectors, this model of teapot is known as "Boston." Collectors would call it a "Hall Boston" teapot. Just a few minutes later Holmes and Watson are in their flat and on their table is another American Hall teapot, this one in the style collectors call "New York." By Googling "Hall Boston Teapot" and "Hall New York" teapot one can see other examples of them. There were also teapots named after other American cities: Baltimore, Hollywood, Los Angeles, Cleveland and perhaps others. They were extremely durable and nearly always came in a dark or deep exterior solid color with a white interior, the edge of which is always visible around the lid. The movie makers might have made the teapots English to match everything else in the film, such as the telephones, mightn't they.