Apparantly, there are at least four versions of this song, all more-or-less contemporary with each other; the one in the DT, here:  Charlie is my Darling  which was written by Lady Nairne, one by James Hogg, one by Captain Charles Gray, and the one you quote, by Burns.  The first two are Jacobite songs, and quite similar to each other.  I don't think I've seen Gray's version, but I bet Bruce Olson has.

Malcolm