The four boys who were close chums of the girls and had added to the interest and excitement of more than one of their adventures were Allen Washburn, who was very much interested in Betty, and in whom Betty was very much interested; Will Ford, Grace's brother, who had carried Amy Blackford's picture all through the war; Frank Haley, Will Ford's closest chum, and Roy Anderson who had not much distinction of any kind except that he was "lots of fun" and a chum of the other three boys. In the first volume of this series the girls went on a camping and tramping tour, tramping for miles over the country and meeting with many adventures on the way. Later they had more fun at Rainbow Lake, in a motor car, in a winter camp, in Florida, at Ocean View, then at Pine Island where the girls and boys together had cleared up a mystery surrounding a gypsy cave. Later the girls and boys found themselves caught in the meshes of the great war, as many hundreds of thousands of others had been. The boys responded eagerly to the bugle call, and the girls, too, were eager for Army service and finally went to a hostess house at Camp Liberty. Though the girls had never worked harder in their lives, they found that the task had a stirringly romantic side as well. Then in the volume directly preceding this, entitled "The Outdoor Girls at Bluff Point" the girls had had perhaps the most exciting adventure of all. The Hostess House at Camp Liberty having burnt down, the chums found themselves forced to take a much-needed, although not entirely welcome, vacation and had decided to spend it at a romantic spot near the ocean called Bluff Point. The cottage on the bluff had been loaned to the girls by Grace's patriotic Aunt Mary, who declared that she owed something to the chums for having worked so hard for the good old Stars and Stripes. Mrs. Ford, worn out with war work, had gone with the girls to chaperon them. Bad tidings at first threatened to overwhelm the chums. The Fords received word that Will was seriously wounded "somewhere in France" and later Mollie received a telegram from her mother saying that the twins, Dodo and Paul, had disappeared. Still later, while everything was at its blackest, Betty read Allen Washburn's name among the missing. However, everything cleared up later when the twins, who had been kidnapped, were recovered and their kidnapper sent to justice. Still later Allen proved that the report that he had been missing was an error by writing to Betty himself and in the letter he also spoke of Will Ford and the fact that he was getting over his wound splendidly. Of course there had been great rejoicing and the vacation had proved a happy one after all. And now, at the time of this story, the war was over and the first regiments of soldiers had arrived from the other side and the girls were expecting a joyful reunion with the boys at any time.