According to James J. Fuld (The Book of World-Famous Music, 4th ed., pp. 404-405),

"An unauthorized printing, the first edition, was copyrighted Feb. 25, 1848, by C. Holt Jr., 156 Fulton St., New York, N.Y. Front cover mentions the Christy Minstrels and lists 16 titles, only three of which are followed by prices, Oh! Susanna being no. 8 at 25¢. p. [2] blank. m. on pp. [3]-[5]. No plate number. Back cover blank. Engraved. There is no mention of Stephen C. Foster. The publication by W.C. Peters & Co., Louisville, Ky., authorized by Foster, was copyrighted Dec. 31, 1848."

The edition in Richard Jackson's Stephen Foster Song Book (linked to above at my post: Date: 13 Nov 02 - 01:09 PM) is closest to the first unauthorized edition, except that fifteen titles are followed by prices.

"'Oh! Susanna,' the title in common use today, does not seem to have been Foster's original choice. The earliet copies of the song published by W.C. Peters, copies prepared from Foster's manuscript, have the title 'Susanna.[...]
"In his early days as a songwriter, Stephen Foster sometimes presented copies of his compositions to minstrel performers before they were published, a practice that led to several songs being issued in unauthorized editions. 'Susanna' was one such song; more than twenty editions (including arrangements) of 'Susanna,' issued by thirteen different publishers, appeared between 1848 and 1851. Several bibliographically distinct copies of most of these editions exist." (Saunders and Root, The Music of Stephen Foster, vol.1, p. 461)

~Masato