“Might be an enemy bomber,” Norma said, and sat straight up.

Marie got the men below on the phone.

Before they could report, the WAC watcher on the water tower roof popped her head through a hole to report the same plane.

Ten seconds later Beth relayed one more message for Black Knob. They, too, had heard the powerful motors of a large plane. It was some distance north of the mysterious light and apparently flying straight toward it. Here surely was a mix-up.

Then the report from the men below came up. No large plane was due anywhere in this region except some new transport planes being flown overland.

“But what would one of these planes be doing fifteen miles out to sea?” was the question that came from the puzzled representatives of the Army.

In the meantime, out on the Black Knob spotter tower, Betty and Grandfather Norton were wracking their brains for answers to all these problems.

“That big plane certainly is going straight for that strange light,” Betty insisted.

“There’s no denying that,” Grandfather Norton agreed, moving his listening horn first this way, then that, to get its exact location.

It was strange, standing there, watching that light and at the same time hearing but not seeing the big plane.