Johannes Donjon (1839 - 1912), born in Lyon and student of Jean Louis Tulou at the Conservatory in Paris, is considered an outstanding representative of the „Belle Epoque“ who managed to make his audience feel enthusiastic about his salon music. His cadenzas on Mozart's Flute Concerto in D major KV 314 as well as various flute etudes are still known today. The first print mentions a musician by the name of Robert as being the author of the accompaniment, but we have hardly any facts about his life. The accompaniment part in question is hardly more than a harmonic support for the virtuoso flute "garlands", but it makes the piece an effective concert or encore piece due to its chords which are skillfully placed throughout it.
Difficulty level, roughly compared to ABRSM exam grades. 0 is beginner, 9 is advanced (beyond grade 8).