A grinding sound assured her, she had heard scraping—and she knew the feel of sand.

They stopped like a canoe running out of the waves!

"Sand bar!" shouted Mae, but none of the girls knew just what that meant.

Opening the sail, clear of every reef, Mae tried to get off the bar, and Eugenia urged the tiller to try one spot, then another; but the Blowell stood still, and defied the breeze or water to move her.

"Can't we go?" asked Cleo, just beginning to realize their predicament.

"Not unless we are lifted," replied Mae gloomily.

"Do you mean to tell us we are stuck?" asked Louise.

"That's the simplest way of putting it," replied Eugenia.

"Then," said Grace, still imbued with the spirit of fun. "Where do we go from here?"

"That's a delicate question," replied Helen, for both Mae and Eugenia were too busy to pay heed to nonsense.