So this is my new project - the Husumer Orgelbuch. I did not know of this collection prior to reading Dr. Syre's series on north German organ music on The Barde here, and immediately acquired a copy of this fascinating collection.
The Husumer Orgelbuch of 1758 documents in a unique way how the north German organ music developed in the first half of the 18th century after Lübeck and Buxtehude, and contains 17 works by composers such as Druckenmüller, Zeyhold, Zinck, and Bruhns, as well as a handful of anonymous compositions. 12 of the 17 works are original Concertos for solo organ, not based on prior existing instrumental works.
The book opens with this anonymous Präludium, Fuge, Allegro/Adagio and Chaconne. The Chaconne is (unfortunately) only a 4-bar fragment, and therefore I have not recorded it.