27 copies on WorldCat

Wikipedia:
George Frederick Root (August 30, 1820 – August 6, 1895) was an American songwriter, who found particular fame during the American Civil War.
"Tramp! Tramp! Tramp! (The Prisoner's Hope)" was one of the most popular songs of the American Civil War. George F. Root wrote both the words and music and published it in 1864 to give hope to the Union prisoners of war.[1] The song is written from the prisoner's point of view. The chorus tells his fellow prisoners that hope is coming.