De Witt Clinton's Grand Slow March
DE WITT CLINTON'S GRAND SLOW MARCH. American, March (cut time). D Major. Standard tuning (fiddle). AABBCD. A patriotic composition by Charles P.F. O'Hara, who included eleven of his own tunes honoring American victories of the War of 1812, and politicians of the era, in his collection of mainly traditional Irish and Scotch tunes, sold from "his new music store" at No. 70 William Street, New York, "where may be had a great variety of the most ancient ahnd modern single songs. Also a general assortment of flutes, violins, tambarines, drums, and all other musical instruments." Geoff Hore  (2009) remarks:
Little is known about O’Hara; he does not feature in Captain Francis O’Neill’s Irish Minstrels and Musicians published by The Regan Printing House, Chicago, 1913. It appears that he migrated to USA from Ireland in 1812, aged 31, and his occupation is given as a ‘teacher of music’. This information came from the book British Aliens in the United States during the War of 1812 by Kenneth Scott, published by Genealogical Publishing Co 1979 Baltimore. He married Phebe Elam CARLTON, daughter of Martin L and Frances Elam Carlton at Powhatan County, Virginia on 22 AUG 1816. See brideindex.info.
Researcher Nicholas Carolan  finds mention of O'Hara in the New York paper Columbian of January 2nd, 1813, which says that Charles P.F. O’Hara was a multiinstrumentalist who had ‘resided many years in the west of Ireland’. His name appears on a list of subscribers to a volume called A New System of Mythology, in Three Volumes; Giving a Full Account of the Idolatry of the Pagan World (by Robert Mayo M.D., 1816), that indicates O'Hara was living in Baltimore at the time.
Dewitt Clinton  (1769-1828) was an American politician who served as Mayor of New York from 1803-1815, and Governor of New York from 1817-1822, and was the driving force during the construction of the Erie Canal (derided by some who thought it impracticable as "Clinton's Ditch" during its construction).
Source for notated version:
Printed sources: O'Hara (The Gentleman's Musical Repository), 1813.