One of the main industries of Crumville was a large jewelry factory, owned by Mr. Oliver Wadsworth. Mr. Wadsworth had a beautiful young daughter, named Jessie, and one day through an explosion of an automobile gasoline tank, the young miss was in danger of being burned to death when Dave came to her rescue. This so pleased the Wadsworths that they came not only to the aid of the boy, but also assisted Caspar Potts, who was discovered to be one of Mr. Wadsworth's former instructors at college. "The lad shall go to boarding-school and get a good education," said Oliver Wadsworth. And he accordingly sent Dave away from home, as related in the first book of this series, entitled "Dave Porter at Oak Hall." At that school our hero made many warm friends, including Phil Lawrence, the son of a wealthy shipowner; Roger Morr, the offspring of a United States senator; Shadow Hamilton, who was known far and wide for his yarn-spinning qualities; and many others. In those days the great cloud resting over Dave had been the question of his identity, and when some of his enemies spoke of him as "that poorhouse nobody," he resolved to find out who he really was. Getting a strange clue, he set out on a remarkable ocean voyage, as related in "Dave Porter in the South Seas," and was gratified to fall in with his uncle, Dunston Porter, a great hunter and traveler. Then the lad came back to Oak Hall, as related in "Dave Porter's Return to School." He next went in quest of his father, as told in "Dave Porter in the Far North." "Now they can't say that I'm a 'poorhouse nobody,'" he told his chums, after having met his father. And then, with a light heart, he came back to boarding-school once again, as related in "Dave Porter and His Classmates." Here he made more friends than ever, but likewise some bitter enemies, including one Link Merwell, the son of a ranch-owner of the West. Merwell did all he could to cause Dave trouble, but in the end was exposed and had to leave Oak Hall. "I hope I never fall in with Link Merwell again," Dave said to his school chums, but this was not to be. Dave had not only found his father and an uncle, but he had also found a sister, Laura Porter, who was very dear to him. Laura had a young lady friend, named Belle Endicott, who lived in the Far West, and through this friend Dave and his chums, and also Laura, as well as Jessie Wadsworth, received an invitation to spend some time at the Endicott place. They had a great deal of fun and not a few adventures, all of which have been set down in "Dave Porter at Star Ranch." Not far from the Endicott place was the home of Link Merwell, and that young man, as before, tried to make trouble, but his efforts were frustrated and he left home under a cloud.