The first day passed so swiftly in and about the lodge that night found the Radio Girls unprepared—and their radio set not yet erected.

So it happened that the following morning Jessie got them all up early and set them all to unpacking the various parts of the set while she herself got ready for the hardest part of the work, the erecting of the aerial.

The boys came around, humbly begging to be allowed to work, but, except in the assembling of the parts, Jessie gently but firmly denied their petition.

“We want to show Miss Alling that we are as good sports as she is and really are of some use in the out-of-doors,” she said, smiling at the chaperone, who was interestedly inspecting the various parts of the set. “She wouldn’t believe that we erected the set at home practically by ourselves.”

“I will believe it now when I see it done,” said Miss Alling, crisply, but pleasantly.

“We are the greatest little demonstrators you ever saw,” murmured Amy, handling the detector with fond care. “Watch us and learn.”

“They are altogether too sure of themselves, these girls,” said Fol, in an injured tone. “I guess there is no room for us around here, fellows.”

“We’ll come in handy when they start to string up the aerial,” remarked Darry, in a stage whisper. “I reckon they haven’t the least idea how they are going to do it.”

“Trees!” said Jessie, laconically.

“Humph! Do you suppose you are going to be able to climb into a tree far enough to fasten your aerial wire?”