I just heard The Boatman's Dance which richr referred to above. Aaron Copland wrote an arrangement of it, and according to Karl Haas actually conducted a performance of his arrangement. I couldn't get into the DT just now...the minstrel song is there...so found an MP3 here. It takes forevever to download, but you can stop the download and listen to the first part. This is certainly a beautiful Ohio River song.