Henry C. Work's song. Here's sheet music from the Levy Collection.

Title: Kingdom Coming! Song and Chorus. 11th Thousand.
Composer, Lyricist, Arranger: by Henry C. Work.
Publication: Chicago: Root & Cady, 95 Clark St., 1862.
Form of Composition: strophic with chorus
Instrumentation: piano and voice
First Line: Say, darkeys, hab you seen de massa, wid de muffstash on his face
First Line of Chorus: De massa run? ha, ha! Do darkey stay? ho, ho!
Advertisement: ads on back cover for Root & Cady stock
Plate Number: 192 4
Subject: Civil War--Union
Subject: Afro-Americans
Subject: Caricatures
Subject: Slavery
Subject: Freedmen
Call No.: Box: 088 Item: 120

Sheet music for guitar arrangement (c1861[?]; lyrics transcribed) is at "We'll Sing to Abe Our Song!": Sheet Music about Lincoln, Emancipation, and the Civil War from the Alfred Whital Stern Collection of Lincolniana (Library of Congress).

~Masato