Oh, that's useful! Especially the part where we have a quote from Quantz saying Fritz had just started to learn the flute in 1728. Good, that fits the chronology we used in the fic, according to which he had two years of having to sneak in practice when he could, and over a year without touching it, so his technique is in the dumps when he first picks up the contraband flute Fredersdorf brings him.

Thanks!