Joseph Millard's graphic novel

Joe Millard's rare and early paperback-sized graphic novel is available now on Kindle. Jeff Vorzimmer has uploaded the first chapter to be viewed for free on Scribd here. Millard, who later on wrote lots of Westerns, including the ones with "The Man-With-No-Name", did also the art, at least that's how I figure it. Am I right about this? I don't find any mention on the artist on the site.