They would never forget that first tramping tour when they had tramped for miles over the country, meeting with a great many unusual adventures on the way, as related in the first volume of this series, entitled, "The Outdoor Girls of Deepdale." Nor those other times at Rainbow Lake, in Florida, at Ocean View, and later at Pine Island, where they had come across that marvelous, mysterious gypsy cave.

Then had come the war with the boys on the other side, and the girls doing their "bit" at a Hostess House. And a little later what black distress overwhelmed them, when Will Ford was reported wounded and Allen's name was among the missing! This all happened while they were at Bluff Point taking a much-needed vacation from their work at the Hostess House.

In the volume directly preceding this, entitled "The Outdoor Girls at Wild Rose Lodge," the girls had had same very exciting experiences. An old man, Professor Dempsey, by name, who had retired to a little log cabin in the woods to recover his health, had chanced to do the girls a very great favor. Of course the girls were grateful to him and were very much interested when he told them of his two sons who were in the war. Later, when the girls read of the death of his two sons in the paper, they went to the old man's lonely cabin in the woods, but found themselves too late. According to a friendly neighbor, the old man had become temporarily insane at the terrible news, had wrecked his cabin in an insane frenzy, and disappeared.

Later, at Wild Rose Lodge, the girls were frightened several times by a strange apparition lurking in the woods around the lodge and Moonlight Falls, a beautiful fall of water not far from the cottage where the girls were staying. Later the boys came home from France and helped the girls solve the mystery.

And now here was Betty proposing another outing that promised to be more fun than any the Outdoor Girls had had yet. No wonder that in the clamor of their excited questions and answers no one heard the telephone ringing noisily in the hall.

Finally the Nelsons' maid came trudging up the stairs to answer it herself.

"If I can hear myself think," she grumbled, as she took the receiver from the hook. "With all them girls a-gabberin' an' a-talkin' at the top o' their lungs. Hello—I can't hear you—you'll have to talk louder—you don't know the noise they is in this house. Miss Betty?—jus' a minute——"

"A gen'leman to speak to you, Miss Betty," she announced a moment later, looking in on the hilarious girls. "An' le's hope you can hear him better'n I could, that's all," she grumbled, as Betty pushed by her in the doorway and gave her a friendly pat on the shoulder.

"Oh, they'll keep quiet now, all right," she said, with a laughing glance over her shoulder at her chums. "They'll want to hear what I have to say."

At which taunt the girls started such a dreadful clamor that she really had all she could do to hear Allen at the other end of the wire. Oh, yes, it was Allen!