Tom, the two sailors and Mr. Skeel were on the derelict for some time, and then having patched up the lifeboat they set out in that. But it was some time before they were picked up, and they had nearly starved. There was also a little boy saved from the wreck--Jackie Case--and Tom took charge of him. Eventually Tom got to Australia, and then set out in a small steamer he hired to search for his parents. It was a long trip, but he heard that some survivors of a wreck were on an island in the Friendly group, though which island it was could not be learned. Tom searched on several and at last, and just in time, he discovered his father and mother, and some others who had gotten away in a small boat from the sinking _Kangaroo_. That Tom was overjoyed need not be said, and he and his parents lost no time in starting back for their home in this country. All the details of the wreck, and how Tom brought his quest to a successful close, will be found in the second volume. I might add here that later nearly all those on board the _Silver Star_ were saved, including the father of Jackie Case. Tom went back to Elmwood Hall, and finished the spring term, graduating and becoming a Sophomore. He had come home, ready for the long summer vacation, when he received the letter from Jack Fitch, mentioned in the first chapter of this book. I might state that Tom’s father was quite well off, and that our hero had sufficient spending money for his needs. He had, as I have mentioned, a good motorboat. “Well, dad,” remarked Tom, when he thought his parent had sufficiently collected his thoughts. “Let’s have the story of the secret of the old mill.” “As nearly as I can recollect it,” began Mr. Fairfield, “this mill is located about eight miles from the town of Wilden, where, as I told you, I spent some years when a lad. No one seems to know when the mill was built, but it is quite old, and must have been put up by the early settlers. It is of stone, and used to grind grain by water power. “The mill is on the bank of a small river that flows into Lake Woonset, and it was this lake I was thinking of when I suggested that you go camping near it. It’s of good size, and there is fine fishing in it.” “But about the mill, dad. What’s the secret of it, and what about the wild man?” “I’m coming to that. As I said, the mill was probably built by the early settlers, and, ever since I can remember, there has been a rumor that there is treasure concealed in or about the old place.” “Treasure, dad? What kind?”