Mick, my love,
As per the detailed email I just sent you I found the Playford tune to be "Never Love Thee More"--first appearing in Playford's Vol 1, 6th edition (1679) and being included in editions 8 - 18 thereafter... Source: http://www.izaak.unh.edu/nhltmd/indexes/dancingmaster/
We'll pow-wow on this more in our next chat!
Cheers!
Mary