Historic American Sheet Music - http://scriptorium.lib.duke.edu/sheetmusic/ The Rare Book, Manuscript, and Special Collections Library at Duke University: Major collection of sheet music; digital images of 3042 pieces published in the US, 1850-1920.
Status Code: 301 - Location: http://library.duke.edu/digitalcollections/hasm/
Amoskeag Music - http://scriptorium.lib.duke.edu/sheetmusic/ Historical musician Bob Kilham recreates the sights and sounds of antebellum America using original or reproduction instruments and primary source music.
Dr. Horsehair - http://scriptorium.lib.duke.edu/sheetmusic/ Recordings and banjo instruction books in the modern-day clawhammer banjo or frailing style and the old-time minstrel banjo stroke style.
Halcyon Days Music - http://scriptorium.lib.duke.edu/sheetmusic/ Midi music collection of early American music of the 19th Century and early 20th Century, complete with scans of sheet music covers and lyrics.
John Henry - The Steel Driving Man - http://scriptorium.lib.duke.edu/sheetmusic/ Analysis of songs featuring the folk hero, including lyrics, sound files, and background.
Sons of Dixie - http://www.sonsofdixie.homestead.com/ Information on this vocal quartet who sings songs popular in the American South during the Civil War.
Status Code: 301 - Location: http://sonsofdixie.homestead.com/
Till Family Rock Band - http://www.beardshampoo.com/Loscalifornios/History.html Brief illustrated history of late-19th-century "rock band" (playing on stone xylophones).