If "Say, Brother, Will You Meet Us?" whose tune was taken for "John Brown's Body" and "The Battle Hymn of the Republic" was composed by George Pullen Jackson of South Carolina, why do all the sources I remember cite William Steffe as the composer of the tune for JBB and TBHOTR?

The one most immediately to hand is "Singing Soldiers - A History of the Civil War in Song," put out by Paul Glass and Louis C. Singer. I think it has some claims to authority.

The sheet music published by Oliver Oilson & Co described the song as being "adapted to the favourite melody of 'Glory Hallelujah,'" of which I have not heard elsewhere.

Should I post a copy of this in the "Say, Brother, Will You Meet Us?" thread?