G'day again smokeyjoe,

I had a look in the River of Song companion book. In the Discography, before individual listings for all the recordings by the artists in the series, they have an entry for River of Song:

"Tracks from most of the artists included in the River of Song project appear on the companion two-CD set, The Mississippi: River of Song, Smithsonian Folkways 40086, 1998."

If you search the CDs, you may find a track listing including John Hartford ... and that may be the tune you seek.

BTW: There is also a "Lyrics Credits" section ... and, under 'John Hartford' it mentions: "Miss Ferris", Words and music by John Hartford, © 1977 John Hartford Music and "Gentle on My Mind", by John Hartford, © 1967 & 1968 by Ensign Music Corporation. One of these may be the tune you are after.

Regards,

Bob Bolton