This site introduces unknown Emanuel Bach (C. P. E. Bach).
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs character piece "Buchholtz" (Wq. 117/24) is a work featured in the 1765 collection of character pieces, known for its lyricism and intimacy. The piece is in B-flat major, and its graceful melody and gentle rhythm impart a calm atmosphere throughout. The title "Buchholtz" likely derives from the name of a friend or patron of Bach, expressing gratitude or respect towards that individual. This piece embodies the characteristics of the Empfindsamer Stil (sensitive style), with subtle harmonic changes and delicate ornamentation that leave a strong impression. Performers are required to convey both the elegance and the inner depth of the piece.