An all-black quartet singing "The Old Gospel Ship"? I have one Southern Sons CD (Southern Sons Quartet: I Love the Lord, P-Vine), but the song isn't there. I've checked Blues and Gospel Records 1890-1943, 4th ed. (Oxford) and Gospel Records 1943-1969, 2 vols. (Record Information Services), but there're no recordings of it by the Southern Sons or the Southern Sons Quartet (two different groups). No recordings by black singers under this title before 1943 (the latter discography doesn't have a title index). The versions I have of this song are by Ruby Bass, the New Lost City Ramblers, and Joan Baez, none of them are black singers. Haven't found the Five Blind Boys of Alabama version yet, though the Five Blind Boys of Mississippi recorded "Old Ship of Zion" in 1951.

~Masato