As an old printer myself (20 years in the offset lithography trade) I
can tell you that too many left-handed pipe organs- (or lutes with bass
extensions) in a picture definitely raises a red flag or two.
The manuscript also has a drawing of a spinet. Instead of having alternate
groups of two and three black keys it has three consecutive groups of black
keys. Perhaps it was microtonal! Or had alternate keys for A flat and G
sharp and so on. I think not.
Monica
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