Stilly River Sage, in your extract from the Elektra discography, you missed this one:

Elektra EKL 112 [Mono]
Songs Of The Old West - Ed McCurdy
Produced by Jac Holzman

No date is given, but the site says EKL 110 was released in 1956 and EKL 113 in 1957 (and no EKL 111 is listed).

I wish I could find a similar discography for the Tradition label. As we've established, the Cowboy Songs CD is based on the Tradition LP, Song of the West, not on the Elektra LP, Songs of the Old West.