Lowell Mason Codex
From pipe-organ.wiki
US-Y LM 5056 (also known as Ma21 Y2 L8, The Lowell Mason Codex, or "Codex E. B. 1688") is a manuscript which is held in the Yale University Library. It contains keyboard and organ works by Dietrich Buxtehude, Johann Sebastian Bach, Alessandro Poglietti, and others.
Description
It is believed that the manuscript was written around 1685-88 by Emanuel Benisch.
References
Beckmann, Klaus (editor). Dietrich Buxtehude: Sämtliche Orgelwerke, Band I-II. Wiesbaden, Breitkopf & Härtel, 1997. 104.
Lowell Mason codex: organ music of the seventeenth and eighteenth centuries. collections.library.yale.edu, accessed 20 July, 2023.