Henderson considered I'll Lay Ye Doon to be a descendant of Muldoon the Solid Man; Jeannie Robertson used to sing a fragmentary version, to which Enoch Kent added a couple of verses (presumably of his own making).  Jeannie herself changed her set over the years, adding two lines thought up by Hamish Henderson to complete a verse, and others such as Jimmy Hutchison (who first heard it sung by Kent), Owen Hand and (perhaps) Dominic Behan have written or re-written verses.