Ravenscroft's books are early 17th century, but much of the material in them has been found in a 'Lant MS' of c 1580. Unfortunately I don't have a contents list of the MS, or even know where it is. I think Greg Lindahl that maintains and contributes most to the SCA Minstrel website has it, and mentions it somewhere, but he didn't point that stuff out in his index to Ravenscroft's books that he has on his website (T's last click above, which gives you the facsimile GIFS).