Mira the snow dog (old picture) and I went skiing again today, this time out on Tubbs Road northwest of town at Paul and Jackie's place. Snowed harder and harder all the time we were out - I think we got more than 3 inches in just a few hours. Here is the C.P.E. Bach Cello Concerto in A WQ 172, in three movements:
I. Allegro
II. Largo
III. Allegro assai

This recording is MHS 3219, with cellist Robert Bex and an uncredited chamber orchestra conducted by Pierre Boulez. Kloppman had this record back in high school at Interlochen. It's a wonderful concerto but what always struck me was the long cadenza in the third movement. I've heard at least a couple other recordings of this piece and none has a long cadenza like this. Some performances don't have a cadenza here at all. And this cadenza quotes or at least paraphrases J.S. Bach's Partita No. 3 for Violin:

partita excerpt
cello concerto excerpt

J.S. Bach himself reused the Prelude from the Partita No. 3 in the well known Sinfonia from the Cantata No. 29.