Jeep Man,

In the notes to the CD that Rex referred to above, Lunsford certainly claimed to have written 'Old Mountain Dew'. He wrote:

About 1920 I composed the words and tune to this song, and I put it on a Brunswick record about 1928. Of course, it was somewhat stilted, but it did very well as a record. But following that, the eminent singer 'Scotty' Scott Wiseman of Lulu Belle and Scotty fame added some more modernised stanzas, sang it, put it on record and it was re-popularised. Now we hear it on every hand by the folk singers and entertainers there with their own words, and the tune has stayed very much the same way. But it's well to know the growth of the thing. So I will give just as I composed it in 1920.

Stewie.