Beside the Donnybrook Fair mentioned by Nutty (not a version of this, but a different song sharing its title) there are two quite separate songs called Humours of Donnybrook. None of them, though, is related to the song under consideration here; as we can see, the name of the fair differs radically in almost every version known; the Donnybrook localisation is known in one example only, and would seem not to have appeared on broadsides.
Bruce Olson's article linking the 16th. century Derry's Fair with Coldingham Fair and Monaghan Fair, with some detail on Francis McPeake's performance of the song and a final verse from him not recorded by Peter Kennedy, can be seen at his website as mentioned above:
Bruce also mentions the following, which I had forgotten to include in the list I gave earlier:
MALIGAN FAIR
(Noted by Mrs. G.H. Daly from Mrs. Williams, Colston Almshouses, Bristol, c.1940)
As I was going to Maligan Fair, Who should I meet, but an old beggar there. This beggar's name was Igo, And his wife's name was Old Mother Bendigo; There goes Igo, old Mother Bendigo, 'Pon me honour and Teddy! And Kitty is close to me now.
As I was going to Maligan Fair, Who should I meet, but an old beggar there. This beggar's name was Stick, And his wife's name was Old Mother Fiddlestick; There goes Stick, and Old Mother Fiddlestick, There goes Igo, old Mother Bendigo, 'Pon me honour and Teddy! And Kitty is close to me now.
Subsequent verses follow the same, cumulative pattern:
This beggar's name was Wax, And his wife's name was old Mother Ball o' Wax...
This beggar's name was Shake, And his wife's name was old Mother Shake-a-leg...
This beggar's name was Drum, And his wife's name was old Mother Beat-a-Drum...
This beggar's name was Long, And his wife's name was old Mother Run-along...
This beggar's name was Cock, And his wife's name was old Mother Shuttlecock...
Journal of the English Folk Song and Dance Society, vol. 4, number 2, 1941. Frank Howes, the then editor, added this note:
"We owe the recovery of this song to the bombardment of Bristol. Under the Bristol Holiday Scheme Mrs. Williams, who lives in the Colston Almshouses, went to stay at Churchdown in Gloucestershire. Her hostess, Mrs. Molly Cockayne, who contributed the song to us, suspected from her interest in singing that she might know some traditional songs. In due course, Mrs. Williams produced Maligan Fair, which she sang with appropriate gestures. She is now over 70 but remembers clearly what she heard sung when she was a girl."
The Roud Folk Song Index assigns Roud number 666 to this group.
A midi of the tune for Maligan Fair can be heard via the following link. Could you transfer it to the Mudcat Midi Pages at some point, Joe?