Anderson Rover had gone to Africa to locate certain mines in that country, and when many years passed and no word came from him the three boys grew worried and wanted to go in search of him. At last came a strange letter written by a sea captain, containing some important information, and acting on this the Rover boys, accompanied by their Uncle Randolph, set out for the heart of the Dark Continent to find the long-lost. On the way they fell in with one Alexander Pop, who had formerly been a waiter at Putnam Hall, who proved a valuable friend when it came to dealing with men of his own ebony hue. In this hunt they likewise ran across Josiah Crabtree, who was out with an exploring party from Yale, and with Dan Baxter, and both of these rascals tried to do them much harm. But the schemes of the rascals fell through, and Crabtree only escaped after a severe whipping at the hands of Dick Rover, while Dan Baxter fared little better. Soon after this Mr. Rover was found, as a prisoner of a savage African tribe, and rescued, and then the entire party returned to the United States. Alexander Pop remained in the employ of the two elder Rovers, and the three boys returned to finish the term at Putnam Hall. These are a few of the things that had happened. But there were countless others, which space will not permit being mentioned here. There had been many contests, in baseball, football, and other sports, and jokes that seemed to have no end, and there had also been a disastrous fire, which none of the Putnam Hall cadets were likely ever to forget--a fire as thrilling as the scene now being enacted on the road. But I am afraid I have already left the boys in the runaway stage too long, so we will return to them without further delay. "The bridge is down!" The cry rang through the stage, bringing every cadet to his feet on the instant. "Don't jump!" cried Dick, as he saw several preparing to leap. "You will break your necks!" For now the bushes were left behind, and on either side of the road were jagged rocks, covered here and there with withered vines. As Dick spoke he pushed his way to the front of the stage and crawled out on the driver's seat. "The back--drop off at the back!" came from Frank Harrington, and he showed how it could be done. But the road was now rougher than ever, and he landed on his knees and his face, giving himself an ugly cut on the chin. Dick was trying to reach the reins when Tom came down beside him. "Can you make it?" asked Tom. "I can try," was the desperate answer. "If only we could block those wheels!" "Block the wheels!" came from half a dozen, and one boy, who happened to have a stout cane with him, thrust it out between several of the spokes of the wheel on the left, in the rear. For an instant the stick held, then it snapped, and the wheel went around as before.