This is a kind of 'round' (like Three Blind Mice, a version of which was also published by Ravenscroft ). This one is much longer and more sophisticated than our usual children's ones - having four separate 32 bar melodies that can be sung separately or together.
What I like very much about this piece is the harmony of the second half of the verses - bars 17-32 - perhaps especially 22-24, which is gorgeous and very 17th century; the kind of harmony that you don't get before or after this time, which which is just delightful.
(BTW I don't understand why this is three, rather than four, country dances in one...)
If anyone can explain - musically - how this kind of effect is obtained, I'd be pleased to hear; because I can't work it out. (There is loads of it here by Thomas Tomkins; one of the greatest pieces ever written IMO.)
I've always assumed it was an harmonic 'movement', produced by contrapuntal voices, that was later ruled-out as insufficiently smooth and homogeneous (it jumps-out of the texture) - rather like the ban on parallel-moving, open-fifths, despite that these were the first foundation of Western harmony.
If you want to see what is going on, here is a version that shows a musical score of the separate vocal lines.
Note: The synchronicity fairies have been at work, since Frank Berger has also today published some 17th century music - although his example is pretty Scheidt.