"Isn't it time for Cricket to turn up?" said Eunice, at last, suddenly interrupting herself. "She's been gone perfect ages. I really believe her cannibals have eaten her up."

"If they have," replied Edna, decidedly, "they would soon repent it. Nobody could digest her, for she would fly around so. I believe even the pieces of her would jump up and down in their stomachs."

"I thought she would just row around the island, and then come back and hail us, at all events," said Eunice, laying down her book and standing up to give the call. The "wah-whoo-wah!" rang across the water, but brought no answering cry. They gave it again and again, with no better success.

"What geese we were to let that child go away with the boat!" exclaimed Edna, vexedly. "We should have known better. Likely as not she's rowed over to Plymouth and forgotten us entirely. Let's go up and see if we can see her from the top of the rocks."

Accordingly they climbed to the highest point. It was high noon now, by the sun, and very hot. Not a sail was in sight, nor even a rowboat anywhere.

Everybody had evidently been driven in by the heat, which was intense. The tide was going out, and soon a mud-flat would lie between them and the home shore.

"Gracious, isn't it sizzling hot!" cried Eunice, shading her eyes. "The heat just quavers up from these rocks. I believe a coffee-pot would boil if you put it on top of my head. Where is Cricket?"

"The tide is going out very fast," said Edna, anxiously. "Look at the high-water mark. If we're not off here in less than half an hour we have to wait till the tide is up again. That's a nice prospect, too, to stay here and broil all the afternoon."

"Horrors!" cried Eunice. "I like to stay here when I want to, but I don't want to be made to. When could we get off, then?" for Eunice knew much less accurately the times and tides than Edna, who always spent her summers at Marbury.

"It was high tide at eight this morning, so it won't be entirely out till two. But you know there is about an hour and a half before ebb tide that the flats are bare, and, of course, it's the same time after that before enough water comes in to float a boat. I don't believe it's more than twelve now. Think of staying here till, say, four o'clock. Let's call again. She might be over on the other side of Clark's Island."