Source: John McFadden in Waifs and Strays of Gaelic Melody¹

Earlier versions of the tune appear in Levey² and Kerr³, both in the key of C, but without a third part.
A two part version found in Goodman⁴ from the 1860s has a second part bearing some resemblance to the third part here but with a key relationship more consistent with its other part, as compared to McFadden’s version which has the feel of a key change.

O’Neill’s account of McFadden from Irish Minstrels and Musicians can be found here.

1. Francis O’Neill (ed.), Waifs and Strays of Gaelic Melody, 2nd. ed, Chicago, Lyon & Healy, c1922. #222, p122.
   Also appears as Downing’s Reel in:
   Francis O’Neill, The Dance Music of Ireland (1001 Gems). Chicago, Lyon & Healy, 1907, #591, p.108.
2. The Dance Music of Ireland. Second Collection. R. M. Levey. London, 1873. #95
3. Merry Melodies for the violin vol. 1. James S. Kerr, Glasgow, c. 1880. No. 18, p. 35.
4. Hugh & Lisa Shields (eds.), Tunes of the Munster Pipers: Irish Traditional Music from the James Goodman Manuscripts. Volume 2. Dublin: Irish Traditional Music Archive, 2013, #789, p.106