I think "The Cowboy, I" just means "The Cowboy, [variant] one". And since Lin at first placed a later verse at the start of the text, Spud spuddied the waters by listing it as a separate song from "The Cowboy's Soliloquy". There are actually only three songs that have gotten confused here, with the main one--now listed in the thread's title, thanks to Joe--having at least three titles: "The Cowboy's Soliloquy" (McCandless's title), "The Cowboy" (as collected by Lomax) and "The Biblical Cowboy" (as collected by Thorp).