...the visit to München was spontaneous with only a few hours to spend allowing not enough time to retrieve Duerer’s own copy of the Manual from the air conditioned vaults but I was able to sight an 'Ektachrome' reproduction of the page with 'Man drawing a lute'. As this Ektachrome shows the book opened, two pages are visible. On the right side is the print of 'Lute' but the left page is covered by an inserted loose leaf with a hand written text and sketch by Dürer himself. link 
.
A wonderful story on its own. But also a web site to which I should like to return.
These too: