Show said to have demanded tor letters which he threatened to turn over to federal au thorit les chicago william S mcswain and cole his brother in law were arrested here friday charged with attempting to blackmail J ogden armour and other meanders mern Ders of armour co lor fio in connection with the beet trust investigation with letters which they are alleged to have stolen from the files of the company mcswain was employed by armour co for tour years as a stenographer in that way had access to part ol 01 the mall of the packinghouse pac kinghouse since the recent beef investigation was begun it Is charged be has taken letters from the files of the concern thre weeks ago it Is alleged he approached mr armour the letters over to the federal au thorit les was paid mr armour relapsed to listen to the proposition and then mcswain it la alleged made similar demands on other officials ot the armour company cole it la claimed stood in with mo swain in the scheme |