“This is getting more and more complicated,” declared Bess. “Oh, I do hope it won’t turn out to be that horrid Mr. Cross, or any of his men.”

“Hush!” said Cora, in a low voice. “Don’t make Nancy nervous. She is alarmed enough now.”

It seemed as if night would never come, and the boys and girls hardly had the heart for amusements to make the time pass more quickly. They remained near the bungalows, going in bathing when the tide was right. Belle was learning to swim with considerable confidence.

“You are getting quite brave,” Cora told her when she had gone out to the float and back all alone.

Eline, who was rather daring in spite of her timid manner, made a half-suggestion that the girls go out in autos to see what happened at Shark’s Tooth, but Mrs. Chester, exercising her authority, vetoed the scheme.

Mr. Haley started off alone, and was followed later by the boys, who arranged to conceal themselves where they could have a view of the ledge of rock that was uncovered at low water.

There was a half-moon that night and by the light of it Jack and his chums could see the long, black ledge extending out into the bay. They had a glimpse of Mr. Haley walking slowly up and down the beach, now and then looking at his watch to note the time. Jack and the others did likewise.

“It’s nine now,” whispered Walter, after a long–a seemingly long–wait, though it was really only a few minutes.

“And nothing seems to be happening,” remarked Jack.

“Look!” suddenly exclaimed Ed, pointing to the sandy stretch. A dark figure was seen gliding over it–a figure of a woman–alone!