Tabs and sheet music are available at https://shop.per-olovkindgren.com/?s=sor+b-minor&post_type=product This is the famous B-minor study Op. 35 No. 22. It is said that Sor used this piece as an encore in London and was called in 5 times to play it again and again... I don't know if it's true, but it's a good story .-) Picture is of F. Sor's tombstone.