From the Publisher
Vivaldi's composition published in this edition is, according to our present state of knowledge, the only work of the composer for 2 flutes and basso continuo. Its copy in an alien hand is held at the Library of the University of Lund, Sweden, in the collection of the German composer Joseph Martin Kraus (1756-1792). According to Ryom's catalogue the piece survives in the hand of one Vivaldi's contemporaries.
Difficulty level, roughly compared to ABRSM exam grades. 0 is beginner, 9 is advanced (beyond grade 8).