Here we link to an abridged version of John Armstrong’s theory of two Oswald’s as written by researcher John Kelin.
Armstrong discussed his theory at great lenght in his book ‘Harvey and Lee‘. John Kelin spoke at last years Dallas conference and John Armstrong will be present this Novemer in Dallas.
Here is the article in question, which was first publshed in probe magazine in 1997.
http://spot.acorn.net/JFKplace/09/fp.back_issues/25th_Issue/armstrong.html