Further to Dave's response, Arthur Argo was always in favour of Lucy's non-rhyming version of the chorus, which seems not unreasonable as several of verses are equally rhyme free! I learned it from a tape of Lucy's singing, but had thought that the merchant verse had "But a' his gear wisna worth a groat" for the second line, which I actually prefer because of the alliteration.
And much later I learned the Ord version quoted above because it used the tune of 'The Rigs o' Rye' and the "Hup, hi and whoa" line sat so neatly upon the tune!
Smashing song.