I've now checked all of the versions I have available to me and as I suspected, apart from the odd fragmentary version, they are all almost verbatim one of 3 versions. In other words there is very little variation once you get past the 3 c1838 published versions. All British oral versions follow the standard broadside almost verbatim and American oral versions follow either the 'Southern' version, the songster version, or indeed the British version, right down to the use of the word 'implacable'(one version transposing to 'impeccable').