Show THREATEN TO KILL HEYBURN idaho senator receives anonymous letters threatening his lift washington it Is learned that sen ator heburn of idaho has been to re cel ang anonymous letters threaten thi eaten caten ing his lire which bore an idaho post mark congressman lohn john C chanel of af indiana who mho was NAAS attorney atto iney for governor GoNer nor steinenberg Stenn enberg when he ap pealed before a congressional invests incesti gation committee has baa also been threatened in the same manner neither elthor Is paid much attention to the missile until after the assassination of governor GoNer nor |