Yes, #, William Cuffay was well known as a singer of Chartist songs, glees, and traditional songs, according to those who knew him and according to the Northern Star, which was a Chartist newspaper of the time:

http://cuffay.blogspot.co.uk/2011/02/northern-star.html

That possible reference from Henry Vincent in 1839 is extremely interesting and I hadn't seen it before. Even if it's not an identical song, the use of the word "Democrat" connects them within the traditions of Chartist singing at the time. Thank you very much!

BTW anyone looking for pro-Chartist ballad sheets will do better online at the NLS than the Bodleian.