Who were they?

In a CWTI version {Janaury 1983} they are Id as Peter Kenwell/Kendrum; unknown; Felix Grundy Kennedy; William A Lynch; unkown. {Credit given to a CT source}
In a subsequent letter to CWTI {March 1983} all five were given ID and that there was another version in Texas Panhandle Museum also can be seen here Last picture at http://www.terrystexasrangers.org/pictures/portraits/index.html