But it did not take many years to make Benny a pretty big boy, and one of the boy-kind who always start schemes and devices among their schoolfellows. He seemed to be a born leader, with a crowd of other boys always at his heels ready to follow where he ventured, or to mimic what he did. No one ever walked ahead of him, no one ever suggested things to do or places to go, when the engineer's son was around. He was always the vanguard, but fortunately was the kind of boy who rarely, if ever, led his followers into trouble. Finally someone nicknamed him "the Con," as short for "Conductor," for he still played at railroading, and had long since decided that when school days were over he would go as a train hand, and perhaps be lucky enough to be sometimes in his father's crew. It was about this time, when Benny was twelve, that he invented the signal code, and more than once it got "the gang" out of serious trouble. The little divisional town where he lived was shut in between hills so closely that it was a veritable furnace in summer, and all who could went out camping, or built shacks on the Three Islands in the little lake two miles farther down the track. So Benny and his little brother and sister went with their mother to join some neighbors camping, and dad would come down on a hand-car on off nights to get a breath of air, and the coal dust blown out of his keen eyes. It did not take the shrewd engineer long to discover that the boys on the islands had a signal code. One would stand on his boat landing and wave a strip of white cotton into a lot of grotesque figures, and far off on another island some other boy would reply with similar figures, and after much "talking," the various boys would act with perfect understanding, either meeting out on the lake, in the boats, or going swimming, or building camp fires--it did not matter much what they decided upon, but after these signals they all worked in unison. And one night something happened of real import. It was just sunset one beautiful August day, and Mr. Ellis, wearied with a long, hard run, lay drinking in the wild beauty of the lonely lake, with its forest-covered shores and its rocky islands. Over on the mainland the McKenzie's camp gleamed white in the sunset. One could discern every movement in the clear air, although the tents were a full mile, if not more, from where the wearied engineer lay, grateful for the stillness, after hours of the heated convulsions of the great steed he drove, day after day. "There go the McKenzie boys for a swim, Benny," called out his father. "Too bad you're not with them, but you and I'll go in together here, if you like."