“And here,—” he pulled a cord, letting in a flood of light from above—“Here is your lookout above, in case the enemy is overhead. You’ll only open this on special occasions.

“If things get too dangerous, you’ll take a few steps down, and—” he led the way—“this is your refuge.” They went down a narrow stone stairway to at last step into a cavern cut from the solid rock.

“Golly!” Jan exclaimed. “I’m sure glad to see this place. I was getting all covered with goose pimples.”

As for Gale, she gave the rock-hewn room only a quick glance. All that interested and inspired her was in the room above,—her radar set, radio and phone.

“I can see,” said the colonel after studying her face, “that the boys down there will have a guardian angel who never fails.”

“Not if I can help it,” Gale replied, with deep conviction.

“Of course,” the colonel added, “I wouldn’t want you to feel that the burden is all yours. That would be too much. You are not alone. There are other radar watchers along this ridge. But yours is the key position.”

“It shall be guarded well!” Gale promised.

“Golly, yes!” “With our lives!” Jan, who could not tell a radar set from a radiator added her bit, and they all laughed.

A moment later the colonel was gone, and Gale had lost herself in the study of her radar set.