"The Londonderry Hornpipe", in Gaelic "Crannciuil Doire-Calgaic", also known as "Cash's Hornpipe", "Delaney's Clog", "Delaney's Favorite", "The Derry Hornpipe", "Ladies Hornpipe", "Londonderry Clog" and "Showman's Clog" is an Irish and Canadian hornpipe in D Major. The parts are played AABB (Allan, Perlman, Phillips), AACC (Perlman), AABBCC (Kerr), AA'BBCC'DD (Moylan) or AABBCCDDEEFF (O'Neill).
The town of Derry was renamed Londonderry as a result of being granted to the Corporation of London after the confiscation of the O'Neill estates in 1607. Breathnach states that O'Neill's six-part setting was played by Leo Rowsome, Willie Clancy and most other pipers. The tune was a favorite, records O'Neill (1913), of County Wexford piper Johnny Cash (1832–1909), known as 'Cash the Piper'; in fact, so much that it was locally known as "Cash's Hornpipe". Ken Perlman (1996) states that while this is a three part tune in McDermott's Allan's Irish Fiddler (c. 1920's), on Prince Edward Island the tune is in two strains, although sometimes the second part is the regular 'B' part of O'Neill's melody, and sometimes the 'C' part.
It was printed in Giblin's Collection of Traditional Irish Dance Music (1928), Jarman's Old Time Fiddlin' Tunes, Kerr's Merry Melodies, vol. 3 (c. 1880's), McDermott's Allan's Irish Fiddler (c. 1920's), Moylan's Johnny O'Leary of Sliabh Luachra (1994), 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), Perlman's The Fiddle Music of Prince Edward Island (1996), Phillips' Fiddle Case Tunebook: British Isles (1989) and Phillips' Traditional American Fiddle Tunes, vol. 2 (1995).
It was recorded by Tom Ennis (1917), Tom Ennis & James Morrison (1923), Graham & Eleanor Townsend on Graham & Eleanor Townsend Live at Barre, Vermont, Ward Allen on The Best of Ward Allen (1973) and Ward Allen Presents Maple Leaf Hoedown vol. 2 (1917).