Since this boy had first entered the Elmer household, wounded, dirty, and unkempt as a young savage, he had changed so wonderfully for the better that his best friends of a few months back would not have recognized him. He was now clean, and neatly dressed in an old suit of Mark's which just fitted him, and his hair, which had been long and tangled, was cut short and neatly brushed. Being naturally of a sunny and affectionate disposition, the cheerful home influences, the motherly care of Mrs. Elmer, whose heart was very tender towards the motherless boy, and, above all, the great alteration in his father's manner, had changed the shy, sullen lad, such as he had been, into an honest, happy fellow, anxious to do right, and in every way to please the kind friends to whom his debt of gratitude was so great. His regular employment at the ferry, the feeling that he was useful, and, more than anything else, the knowledge that he was one of the proprietors of the Elmer Mill, gave him a sense of dignity and importance that went far towards making him contented with his new mode of life. Mark, Ruth, and he studied for two hours together every evening under Mrs. Elmer's direction, and though Frank was far behind the others, he bade fair to become a first-class scholar. Mr. Elmer was not a man who thought boys were only made to get as much work out of as possible. He believed in a liberal allowance to play, and said that when the work came it would be done all the better for it. So, every other day, Mark and Frank were sent down to St. Mark's in the canoe for the mail, allowed to take their guns and fishing-tackle with them, and given permission to stay out as long as they chose, provided they came home before dark. Sometimes Ruth was allowed to go with them, greatly to her delight, for she was very fond of fishing, and always succeeded in catching her full share. While the boys were thus absent, Mr. Elmer took charge of whatever work Mark might have been doing, and Jan always managed to be within sound of the ferry-horn. On one of their first trips down the river Mark had called Frank's attention to the head of a small animal that was rapidly swimming in the water close under an overhanging bank, and asked him what it was. For answer Frank said, "Sh!" carefully laid down his paddle, and taking up the rifle, fired a hasty and unsuccessful shot at the creature, which dived at the flash, and was seen no more. "What was it?" asked Mark. "An otter," answered Frank, "and his skin would be worth five dollars in Tallahassee." "My!" exclaimed Mark, "is that so? Why can't we catch some, and sell the skins?" "We could if we only had some traps." "What kind of traps?" "Double-spring steel are the best." "I'm going to buy some, first chance I get," said Mark; "and if you'll show me how to set 'em, and how to skin the otters and dress the skins, and help do the work, we'll go halves on all we make."