I have Jerry Silverman's "Ballads & Songs of the Civil War" and Wayne Erbsen's "Rousing Songs and True Tales of the Civil War". For harder to find tunes Johns Hopkins has made their Lester S. Levy Collection of Sheet Music available on line at: http://levysheetmusic.mse.jhu.edu Duke Univ. is another good online source at: http://scriptorium.lib.duke.edu/sheetmusic Some of the tunes that I copied from the online sources are: Aura Lea, Hartimes Come Again No More, Kitty Wells, O Touch Not My Sister's Picture, Rose of Alabama, Sweet Evelina, The Blue and the Gray
One tune that I have not been able to find is "Green Grows the Lilacs." Does anyone know a source for this tune?