As far as Jack Farley was concerned, there was nothing that was going to keep him from hiking the 2,200-mile length of the Appalachian Trail. This trekker from Truro would not be deterred — even it meant finishing the extraordinary expedition in sections. No, not high rocky terrain, snow, bears, the long stretches of solitude, insects … Not even a 2012 head-on automobile accident in Wellfleet, which nearly claimed his life, was going to get in the way of this quest, which he