Thanks beginner.

Have you come across William Chappell's Popular Music of the Olden Time? Available online here - http://ia600409.us.archive.org//load_djvu_applet.php?file=19/items/PopularMusicOfTheOldenTime/PopularMusicOfTheOldenTime.djvu but still in print in fascimile, available from Amazon and elsewhere - http://www.amazon.co.uk/Chappell-Popnlar-Music-Olden-Time/dp/1402161077.

For The Hern, have a look at The Corpus Christi Carol - http://en.wikipedia.org/wiki/Corpus_Christi_Carol.