The weather had been uncertain all day. When Lorna and Conny Degger came over from the Clay Head and borrowed the lightkeeper's dory, Tobias would surely have warned them against going out had he seen them. But he was taking his daily nap, for his care of the lamp in the tall tower kept him awake a good part of each night.

Gusts of wind were swooping down upon the sea and ruffling it into lurid patches far off shore—certain indication of coming trouble. After the dory was beyond the shelter of the reefs the pleasure seekers saw streaks of driving rain racing across the wave tops, away out on the open sea. But the fish began to bite ravenously.

It was while their luck was so good that Lorna saw suddenly a figure scrambling over the shore-end of the outer reef, and waving an energetic arm to them.

"Now, what does he want?" the girl demanded, with no little exasperation.

"Who is it? The skipper?" Conny asked lightly, and without turning his head.

"It's Ralph," she said shortly.

"Oh! Endicott? He is always trying to butt in, isn't he?" suggested Conny, laughing. "Sour grapes, I suppose. Let him swing his arm off. He doesn't own this boat."

Lorna giggled. "It's funny," she commented, glancing back at the figure gyrating on the rock. "Ralph doesn't often get so excited. And over what, I wonder."

Neither she nor her companion looked skyward. Over the bay a black mass of cloud had risen and was rolling toward the open sea. Lurid lightnings played upon its edges.

The dory in which the girl and Conny Degger sat was several cable-lengths off the jaws of the reef. It seemed as though they had plenty of clear-way in which to manage the craft if a squall did strike. Neither, however, expected what was threatening from the cloud.