"O'Dwyer's Hornpipe", in Gaelic "Crannciuil Ui Dubuidir", also known as "Dwyer’s Hornpipe", "Durroch’s Hornpipe", "McConnell’s", "Rock's Hornpipe", "O’Keeffe’s Hornpipe", "Prime's Hornpipe", "Prine’s Hornpipe" or "Waterford Hornpipe" is an Irish hornpipe in G Major. The parts are played AABBCC (Levey), AA’BB’CC’ (Harker/Rafferty, Moylan) or AABBCCDD (O’Neill). In County Donegal the hornpipe is known as "An Gasur Mor" (The Big Young Lad), from the playing of fiddler John Doherty. The melody appears first in print in O’Farrell’s Collection of National Irish Music for the Union Pipes & Pocket Companion for the Irish or Union Pipes (1797-1800) under the title "Waterford Hornpipe". Seamus Ennis recorded this hornpipe. The fourth part of the tune (acutally part 3 in O’Neill’s version) was added by Captain O’Neill in Music of Ireland (1903). It was printed in Harker's 300 Tunes from Mike Rafferty (2005), Levey's Dance Music of Ireland, 2nd Collection (1873), Krassen's O'Neill's Music of Ireland (1976), O'Neill's Music of Ireland: 1850 Melodies (1903), O'Neill's Dance Music of Ireland: 1001 Gems (1907) and O’Neill's O’Neill’s Irish Music (1915). It was recorded by Johnny O’Leary on An Calmfhear/The Trooper, Néillidh Mulligan on The Leitrim Thrush and Mick Maloney on Strings Attached.