I have spent the past two days in a heightened state of musical-archaeological bliss. A very kind person scanned the manuscript of an otherwise unknown (not even mentioned in Grove) Duo for Violin and Cello by Anton Ferdinand Titz into the Petrucci Library. I'm not sure if the piece has ever been played before (even in Titz's lifetime) because the parts were filled with errors that would have made it unplayable from the manuscript. What a treat it was to correct them, and what a thrill it is to hear this wonderful whimsical piece.
Look at the cover page. Titz lettered it himself. Look at the backwards capital F!
You can hear a synthesized audio file here. Here's a link to the PDF file.
Previous Titz-related posts:
Doesn't This Make You Curious?
The Dedicatee of Haydn's Opus 33 Quartets