I have the 1938 edition. In it, John Lomax comments that the original 1910 edition contained the songs more or less in the order they were found, while the present edition groups them under headings -- Up the Trail, The Round-Up, Dodge City - the End of the Trail, Campfire and Bunkhouse, Off Guard. "Son of a Gun", Way Out West.

A number of songs in this edition cite "Owen Wister's version".