"Paddy Whack", in Gaelic "Paidin an Bualadoir", also known as "Paddy Wack”, “Paddy O’Whac”, “Little Peggy's”, “The Pig under the pot”, “Tommy Reck’s”, “When history's muse”, “The Green Joke” or “Harp that in Darkness" is an Irish, Scottish, English and American double jig and quick march in G Major (Ashman, Ford, Kerr, Mulhollan, O'Neill, Peacock, Phillips, Raven, Ross), D Major (Bayard) or A Major (Cole, Miller & Perron, White). The parts are played AB (Bayard, Peacock, Raven), AABB (most versions) or AABB' (O'Neill/1001).
This popular tune has been often published from the later 18th century in both fiddle and fife collections; some later publications have called it "Paddy O'Whack".
After appearing in numerous country dance volumes, “Paddy Whack” was often printed in instrumental tutors such as Longman and Broderip’s Entire New and Compleat Instructions for the Fife (c. 1780), Thompson’s Compleat Tutor for the Hautboy (1790), Wilson’s Pocket Preceptor for the Fife (1805), and Clementi’s Entire New and Compleat Instructions for the Fife (c 1815), and, in America, Joshua Cushing’s Fifer’s Companion No. 1 (1805), David Hazeltine’s Instructor in Martial Music (c. 1810), and Gilford’s Gentleman’s Pocket Companion for the Flute or Violin (c. 1802).
Several songs have been set to the air, including the British "Villikins and His Dinah", the Irish partisan song "The Old Orange Flute", the Irish War of Independence song "The Bold Black and Tans", the bawdy song "The Thrashing Machine" and the American song "Betsy from Pike".
County Cork cleric, uilleann piper and collector James Goodman entered the tune into his mid-19th century music manuscript collection as "Pig under the Pot". He also entered a five-part setting of the tune in Book 4 of his collection as "Paddy Whack".
It was printed in Aird's Selection of Scotch, English, Irish and Foreign Airs, vol. 1 (1782), Ashman's The Ironbridge Hornpipe (1991), Bayard's Dance to the Fiddle (1981), Cole's 1000 Fiddle Tunes (1940), Ford's Traditional Music in America (1940), Frank Harding's Harding's Original Collection (1897), P.M. Haverty's One Hundred Irish Airs vol. 1 (1858), Kerr's Merry Melodies, vol. 1 (c. 1880), Johnson's A Further Collection of Dances, Marches, Minuetts and Duetts of the Latter 18th Century (1998), Knowles' The Joseph Kershaw Manuscript (1993), Levey's Dance Music of Ireland, 2nd Collection (1873), Miller & Perron's New England Fiddler’s Repertoire (1983), Mulhollan's Selection of Irish and Scots Tunes (1804), O'Flannagan's The Hibernia Collection (1860), 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), Peacock's Peacock’s Tunes (1805), Phillips' Fiddlecase Tunebook: British Isles (1989), Phillips' Traditional American Fiddle Tunes, vol. 2 (1995), Raven's English Country Dance Tunes (1984), Robbins Music Corp.'s The Robbins collection of 200 jigs, reels and country dances (1933), Robert Ross' Choice Collection of Scots Reels or Country Dances & Strathspeys (1780), Ryan’s Mammoth Collection (1883), Samuel, Anne & Peter Thompson's The Hibernian Muse (1787), White’s Unique Collection (1896) and Geoff Woolfe's William Winter’s Quantocks Tune Book (2007).