A 15th century Latin chronicle, "Chronicon Holsatiae vetus", found in Gottfried Leibniz's Accessiones historicae (1698) is
widely given as a reference but is rare as a physical book and rather surprisingly difficult to track down as an e-book.

I have managed to find an e-book version (in latin of course) in two volumes.

Volume I

Volume II

VETUS CHRONICON HOLSATIAE