A large proportion of Burns's output. Most good editions of his work will tell you where he got the tunes (often recently composed fiddle tunes).

"Caller Herrin" (tune by Nathaniel Gow, words by Caroline Nairne).

"Up and Awa wi the Laverock" (I forget who wroite the words, the tune is part of "The Jig of Slurs" by G.S. MacLennan).

I'd never heard of Alma Cogan singing words to The Bluebell Polka, or that such words existed - has somebody got them?