I noted in the other thread (Feb. 1998) that Linscott's statement made no sense. I also requested, in vain, a copy of the ballad on the capture of Carrickfergus.

Quoting the 2nd edition, 1962, of Linscott's 'Folk Songs of Old New England', p. 87 (under the dance "Lady of the Lake")

'The tune "Come, Haste to the Wedding," of Gaelic origin, was introduced in the pantomime, "The Elopement," in 1767. This version is known as the Manx tune and was printed by the Percy Society in 1746. It is the basis of the Manx ballad, "the Capture of Carrickfergusby," written by Thurot in 1760.'

Garbled it remains (As in the Fiddler's Companion index on the Ceolas website)

In the Scottish Mansfield/St. Clair MS, c 1785, there are two songs directed to be sung to "Carrick Fergus", the first being "Come haste to the wedding" (or "Rural Felicity", both of which became alternative titles for the tune), and another that I've not seen, "O save ye dear Towdy, ye're welcome to Dublin". There may also be a song to it under it's "Dargle" title, one song called "The Dargle" commences "How happy are we", c 1770, but I have neither song nor tune. What confuses the matter is there's a different (9/8) tune also called "The Dargle" (in 'The Irish Fair', 1772). To further confuse matters there's a song called "The New Dargle", c 1770, that commences "Come haste to our wedding", whose song and tune I don't have. For all the names for the tune see the Irish tune index on my website.