Not exactly Documentation and Manuscripts, but it still fits close enough. This will be a list of books that I have found helpful. I may, or may not add commentary. Feel free to ask questions about them.
https://www.woodenswords.com/German_Longsword_Study_Guide_p/book-ger01.htm
German Longsword Study Guide
by Keith Farrell & Alex Bourdas
Paperback
New Book! "Historical Fighting Fundamentals: German Longsword
This book offers insight into the historical martial art attributed to the German fencing master, Johannes Liechtenauer. The key concepts and techniques belonging to this martial tradition are described in detail alongside high-quality, color photographs. Those interested in pursuing an understanding of fighting with the German longsword will find this book of considerable value."
SHOP