✹ About Friday 4 January 1666/67 Mary K on 5 Jan 2020 • Link Much as I like the suggestion that Mr. Isaac's Maggot may explain the reference to Isaac's balls in this version of the song, we really need to see text of the earliest citation of the song's existence (1661) to know whether or not that was in the earliest known version. Clearly the reversal of stanza's five and six in the later version indicates some later editing of the text (and not a very happy edit in terms of the thematic flow of the song). It's therefore possible that the reference to Isaac in the 1668 text may indicate a later change, perhaps a contemporary reference to the dancing master's burgeoning reputation after 1675. There is a fairly common tendency for 'contemporary' allusions to be grafted onto existing popular songs/ditties over the years. Modern comedians/satirists often resort to this trick.