"This," explained Jack, with the voice and manner of one standing on a box before a tent and touting for a curiosity, "is Gastong, the boy tramp of the Isthmus. If he had a place to sleep he would run away from it before night. If he went to bed with a dime in his pocket he'd dream it was there and get up and spend it. If he was set to digging in a mine he'd chop his way through and come out on the other side and run away. If he was--"