The song of the "contrabands" : "O! let my people go" / words and music obtained through the Rev. L.C. Lockwood ; arranged by Thomas Baker.

Also known as Go down, Moses.
Title, [1]; music, 2-4; lyrics, 5; advertisement, [6].
Possible first edition of the sheet music.
The "Contrabands" were formerly enslaved fugitives who had fled Confederate territory during the United States Civil War to seek freedom behind Union lines; upon successfully reaching Union territory, they where they were legally designated "contraband of war" and were subsequently recruited to assist the Union forces in their efforts against the Confederacy.
Rev. Lewis C. Lockwood was an agent of the American Missionary Association who served as chaplain to the refugee community of formerly enslaved "contrabands" residing at the Union stronghold of Fort Monroe in Hampton, Virginia, during the Civil War.
"This Song has been sung for about nine years by the Slaves of Virginia. L.C.L."--p. 5.
"This song originated among the 'Contrabands', and was first heard sung by them on their arrival at Fortress Monroe; and was introduced here by their Chaplain: Rev. L.C. Lockwood"--Caption.