Charles Magnus, Boston, printed an early broadside (n. d.) but mis-spelled the author's name as "Charles Macray."
J. Andrews, New York, n. d., printed a broadside with Mackay's name, music attributed to Henry Russell.
As previously posted, Foster's sheet music, entered by W. C. Peters in the Clerk's Office of the District Court of Ohio, 1846, did not name Mackay, but said the lines were from the London Daily News.

The Hutchinson Family sang the song in 1847, "written by Charles Mackay, symphonies and accompaniments by E. L. White."
All of the above at American Memory.

No broadsides seem to be in the Bodleian Collection.