See also Wm. Chappell's 'Popular Music of the Olden Time'. Many pieces in Ravenscroft's 3 books on the SCA Minstrel website (with the 16th century ballad project) are found earlier in what is called 'the Lant MS', c 1580, but I don't have a list of them. ABCs of all the known broadside ballad tunes of the 16th century are on my website, but not separated from the 17th century ones (and a few 18th century ones). Note that many were imported (French and Italian).