Those who wonder where the melody lies in this setting may have a look at that other thread, message from masato sakurai 04 Jan 06 - 01:09 PM. The melody transcribed from "George Pullen Jackson's Another Sheaf of White Spirituals ([1952]; Folklorica, 1981, p. 78)" entirely corresponds to the middle voice ("tenor") of Ingalls's arrangement, but is more "regular". I would guess that it is close to the common ancestor, but it could also be copied from Ingalls and "regularized". (BTW: The word "tenor", literarily meaning "holder", was originally used for the pre-existing melody of an arrangement; additional voices would be higher [altus] and/or lower [bassus]. Ingalls, though definitely non-academic, may have been aware of that tradition.)

The Ingalls version is "nonstandard" in more than one way.