I played this 17th century tune in a barn dance last night. As is not uncommon with tunes of that period it has an asymmetric 8+10 bar structure.
You can hear the tune and see the dance here:
http://www.youtube.com/watch?v=yFk-fDoE47w.
This video was apparently made in Russia, so make what you will of the calling! Our dancing last night here in England was rather brisker.
A tythe (or tithe) is a church tax system devised many centuries ago (9th century in England) and was, and still is, common in many countries and under different faiths. It was originally 1/10 of the tithe-payer’s income, and was paid in kind, hence the "pig" in the title of the tune. The system was abolished in the UK only a few years ago but is still compulsory (although presumably not in kind) for church-goers in countries such as Austria and Germany.