they made a trip through the air to Hope Seminary, and at that time Dick was delighted to place upon Dora's finger a diamond engagement ring.
A short while later an alarming thing occurred. The boys were out in the Dartaway when they met Grace on the road and learned that Dora and Nellie had been abducted by Josiah Crabtree, Tad Sobber, and some of their other old enemies. They gave chase in the biplane, and, after several adventures, located the girls in a lonely mansion in the country, where they were prisoners, in charge of Sobber's aunt. The boys at once went for the authorities, and, after something of a fight, the rascals were made prisoners, and the girls were rescued and taken back to the Seminary.
"You will appear against these scoundrels?" asked the sheriff, Jackson Fells, of the Rover boys, as they were about to leave the sheriff's office at Plankville.
"We'll appear all right enough," Tom had answered. "Why, Mr. Sheriff, you couldn't beat us away with a club!" And so it had been arranged that the Rover boys should appear in court against the evildoers whenever wanted. Then Crabtree, Sobber, and the others had been put under lock and key in the old-fashioned coun-
