"Mrs. Trevellyan has often talked of excavating them," remarked Miss Birks. "I hope she will do so. It is quite possible that some very interesting relics of the Stone Age might be turned up. It would probably fix the period when they were inhabited."

"How long ago would that be?" asked one of the girls.

"Most likely about two thousand years or more."

The conversation at this point was interrupted, for in the distance appeared Miss Herbert, running, beckoning and calling to them all at once. In considerable alarm they went to meet her.

"Where's Ronnie?" she gasped. "I've lost him! Oh, has anybody seen him? Is he here with you?"

"He's certainly not here," said Miss Birks. "We've not seen him since we met you an hour or more ago. When did you miss him, and where?"

"On the beach," sobbed Miss Herbert hysterically. "He was playing with his little shrimping net. I sat down to read my book, and I kept looking to see that he was all right, and then suddenly he had disappeared. I thought he must have trotted back round the point, so I followed, but I couldn't find him. I hoped he'd come up here to you. It's very naughty of him to run away."

"We must find him at once," said Miss Birks gravely. "Girls, you had better go in parties of three, each in a different direction. Miss Barlow and I will go with Miss Herbert. We won't give up the search until he is found."

"Did he go round the other corner of the cove?" asked Gerda.

"He couldn't. The waves were dashing quite high against the rocks. I'm sure he would never venture," declared the distracted governess.