[1][2][3] John Stuart Mill Tane lived in the Mormon settlement of Mesa City, Arizona.
In Impulse Annual #2 (1997), a backup story revealed that, at the time of his mother's death, Johnny Tane is inspired to create a secret identity by Max Mercury.
As revealed in DC Comics Presents #28 (1980), Johnny eventually retired from action, marrying the similarly-retired outlaw (and another All-Star Western feature) Madame .44 (Jeanne Walker), and the couple bore a daughter, Rebecca, and a son, Chuck.
This was an intentional nod by writer Mike Tiefenbacher to Chuck Taine (with an I) which is the real name of Bouncing Boy of the Legion of Super-Heroes, but it has never been suggested in-canon that the latter is a descendant of the former.
The track describes the pages 20 to 23 of Crisis on Infinite Earths, issue #3, when the DC western-related characters, namely Jonah Hex, Scalphunter, Bat Lash, Nighthawk and him, investigate a machine which has appeared in an abandoned mine.