He played Geronimo in several westerns as well as a famed sidekick to Clayton Moore
According to Clayton Moore, Jay was upset that, as stars of a hit... [DOC] [TLE] John Hart dies at 91; the other 'Lone Ranger' - LA Times [PAR] Sep 22, 2009 ... John Hart temporarily replaced Clayton Moore as the Masked Man on the "The ... 
Relaunching his career after the war, he played the title role in the 1947 ... "I don't 
know how many other actors they looked at, but I got the part," Hart ... editor and 
publisher of Western Clippings, a western-film publication.