1 Detroit, Aug, 18.- A south-bound freight train was derailed Monday two miles south of Boyne' Falls. A dozen telegraph poles and a number of trees had been wedged in between the rails w.th the evident 'mtention of wreokiug the north-bound Pet skey passenger. As that train plunges down a heavy grade at great speed nothiug bút a miricle could have suved it f rom going over a flfty-foot embankmeut. The si w freight train going up gra ie had bitter luck. It is thought the wreckers had planned a robbery.