My different sources conflict considerably in dates. Ní Uallacháin refers to 1745 as the earliest record of Thugamar féin an samhradh linn, while Mary Devlin, author of The Lost Music of Ireland, says Thugamar fein an Samhradh Linn was published in 1726 in A Collection of the Most Celebrated Irish Tunes. Perhaps she refers to the tune and title only, while Pádraigín refers to the words being sung to the tune.

I conclude from my websearches that The Duke of Ormond who was in Dublin was James Butler, first Duke of Ormond, 1610-88. Thus the date of 1633 for a procession (see my first message 28 Apr. 2003)is much more plausible than 1745 (which might be the date that the words were published with a comment that they had been such on the occasion of the Duke landing in Dublin a century earlier?)