Hi ya', ET!
The ones I know about are:
Sherlock Holmes: Consulting Detective
Sherlock Holmes: The Riddle of the Crown Jewels
Sherlock Holmes: The Rose Tattoo
The Lost Files of Sherlock Holmes
and, of course "Mystery of the Mummy."
The prior games are all difficult to find, some more so than others. I would suggest checking our Trading Post, then eBay, or GTZ. Bet you'd have to pay a premium for any one of them though.