"This island is too large to explore this morning," declared Miss Elting.
"It may take some days," Harriet nodded, as they strolled about, "but it will be delightful work."
On the outer side they discovered evidences that picnic parties had been there. And then they came upon the remains of a campfire, but it was a small one, as though there had been but a solitary camper, and that some time back.
"I hope no one comes while we're here," murmured Margery.
"How selfish!" laughed Hazel.
By seven o'clock the delighted girls began to retrace their steps toward the houseboat.
"Now, let's go down to the shore and take a look out over the lake," proposed Harriet, and this was done.
There were several boats in sight, but at the distance these looked like mere specks. A large excursion steamer was passing in the middle of the lake. Feeling quite certain that they were in no danger of being discovered the girls found a place in the sunlight and there sat down to bask in the pleasant warmth of the sun.
"Get back, at once!" cried Harriet, suddenly springing to her feet, then crouching. "We don't want to be seen."
The girls retreated up the shore in some confusion, not stopping to ask questions until they were concealed.