Sherlock Holmes links:
The Complete Sherlock Holmes: full text of Conan Doyle's Sherlock Holmes stories and the illustrations by Sidney Paget, Richard Gutschmidt, Frank Wiles, Frederic Dorr Steele and other artists.
Sherlock Holmes Public Library: the cases of Sherlock Holmes and his loyal friend Doctor Watson on BBC radio play versions in free MP3 files to download. (via The Crime In Your Coffee)

More about Sherlock Holmes:
- Sherlock Holmes: free public domain e-books by Sir Arthur Conan Doyle.
- The Quotable Sherlock Holmes: a free copy of my homage to the great detective, Sherlock Holmes in PDF.
- The Sherlock Holmes Museum of Baker Street.
And much more on Wikipedia.