Irish-born composer and bandmaster (1829–1892) best known for writing the lyrics to ‘When Johnny Comes Marching Home’ while a Union soldier during the Civil War. AMQS on an off-white 7.25 x 4.75 sheet. Gilmore pens three bars of music, signed below in black ink, “Very truly yours, P. S. Gilmore.” In fine condition. Accompanied by an unsigned original carte-de-visite portrait of Gilmore. RR Auction COA.