Volume 8 of the Greig Duncan Collection of songs collected in the North east of Scotland some 100 years ago is to be published in a few months, and will include several short sets of words (none very distinguished) to the tune of Soldiers Joy. One popular theory is that these little lyrics seem to have been attached to be sung while dancing to the tune - see an old thread re Auntie Mary Had A Canary for some examples. Attaching new words to old tunes is an old Scottish pastime - Robert Burns was one eminent exponent.