"Haven't the least idea," answered Will, "unless it's someone trying to play a so-called practical joke."
"I'd like to get hold of the player," announced Allen. "I'd run him off"
"Off the scale," interrupted Betty, with a laugh.
"That's it," conceded Allen. "Are you girls all right?"
"All but our nerves," answered Grace.
The boys made a search in the gloom, but found nothing, and once more quiet settled down. Nor were they disturbed again that night. In the morning they laughed.
"Oh, but it's hot!" exclaimed Mollie during the forenoon, when the question of dinner was being discussed. "I think we might go for a swim. There's a nice sandy beach at the side of our dock."
"Let's!" proposed Grace. The boys had gone off fishing.
Soon the girls were splashing around in the lake, making a pretty picture in their becoming bathing suits, of which they had more use than they had anticipated.
"Let's try some diving!" proposed Mollie always a daring water sprite. "It's lovely and deep here," and she looked down from the end of the dock.
