The old anon tune in the Scots Musical Museum (1792) is [roughly]: Key F 3/4 c/f a gf/ ga b- ag/ f a gf/ gt c/ f a gf/ ga c fd/ c b-a ga f etc. Sol-fa-wise , and equally roughly, it's s,/ d m rd/ rm f mr /d m rd/ dt,--s,/d m rd/ rm s d'l/ s fm rm/ d. The Hume tune is often heard, but believe me the traditionalists go for the old one every time. That second tune is like the (American) tune of "Away in a Manger", thus: s,d/ m- rd/ d t, l,/ s, l, s,f,/ f,m, etc. The old tune, incidentally, was first published in the Museum, and seems to have been composed by a Major Logan of Ayrshire.