[Illustration: "WE'RE JUST READY! YOU CAN COME IN IF YOU LIKE!">[
"We're just ready! You can come in if you like!" proclaimed a voice, as two girls in navy bathing costumes and rubber caps issued from behind a rock, and running swiftly down the sand plunged into the water.
Availing themselves of the opportunity Mavis and Merle took temporary possession of the naiads' dressing-room, and in the course of a few minutes more were revelling in a swim. The red rubber caps of the girls who preceded them were plainly to be seen some distance from the shore, where their owners were apparently having a race towards a rock that jutted from the waves.
"Oh, they mustn't go out there! There's an awful current! Bevis warned us about it!" gasped Mavis, swimming securely with one foot on the ground. "Can't we stop them? Shout, Merle!"
"Hello, there! Ahoy! Come back!" yelled Merle, who possessed stronger lungs than her sister. "They don't hear me! Coo-oo-ee! That's done it, thank goodness! Come—back—you're—going—to—get—into—a—current!"
The two red caps, warned in time of their danger, turned and swam into safer waters. They did not venture so far again from the shore, but frolicked with some companions, trying to make wheels and to perform various other feats of agility, which were generally failures and ended in a splash. They were so long about it that Mavis and Merle went from the water first and had time to dress quite leisurely before the others, shaking out wet fair hair, followed to the crevice among the rocks.
The Ramsays took their picnic basket, and, climbing a short way up the steps, settled themselves upon a grassy platform which afforded a good view of the cove below. They liked this vantage-ground better than the sands, and began to spread out the cups and saucers and parcels of cakes which Jessop had packed for them, congratulating themselves upon having a spot at least fairly apart. But they were not destined to spend that afternoon in solitary state. They had scarcely opened their basket when three heads came bobbing up the steps, shamelessly invaded their platform, and also began to unpack tea-cups.
Merle, who did not like other people to trespass upon her rights, frowned and turned her back upon them, and probably each little party would have taken its meal separately had not an unforeseen and utterly untoward accident happened. Mavis knocked their thermos flask with her elbow and sent it spinning over the cliff. Here was a pretty business! Their tea was gone, and the flask, if they found it, would be utterly smashed.
"It's not worth climbing down to pick it up!" lamented Mavis contritely.
"I'm so sorry, Merle! It was horribly clumsy of me!"
"Do have some of ours!" suggested one of the strangers sympathetically.
"We've heaps! Two flasks; and that's more than we shall drink ourselves.
You might just as well!"