ge, later, Tom was able to save himself and the castaways of Earthquake Island, and, as a direct outcome of that experience, he was able to go in search of the diamond makers, and solve the secret of Phantom Mountain, as told in the book dealing with that subject.
When he went to the caves of ice Tom had bad luck, for his airship was wrecked, and he endured many hardships in getting home with his companions, particularly as Andy Foger sought revenge on him.
But Tom pluckily overcame all obstacles and, later, he built a sky racer, in which he made the quickest trip on record. After that, with his electric rifle, he went after elephants in the interior of Africa and was successful in rescuing some missionaries from the terrible red pygmies.
One of the mission workers, later, sent Tom details about a buried city of gold in Mexico, and Tom and his chum together with Mr. Damon located this mysterious place after much trouble, as told in the book entitled, "Tom Swift in the City of Gold." The g