"That is if you can assure us that you won't try any new vanishing tricks." "We give you our solemn promise," laughed Harriet.

"The 'Red Rover' has played her last trick." Harriet's laughing assurance, however, was destined to prove truer than she had dreamed.

The next morning the girls rose early, and after a hasty breakfast went ashore to do their shopping, secure in the thought that the Tramp Club would keep an eye on the "Red Rover." In the meantime the boys had posted a watch on the shore, in the person of Billy Gordon, who seated comfortably on the ground, his back against a big tree, glanced frequently out over the lake to where the "Red Rover" lay at anchor, her red sides glistening in the sun.
It was well towards noon when Billy rose from the ground and strolled lazily down to the beach.

Suddenly his good-natured face took on a startled look as he stared anxiously toward the houseboat.

A moment later he was running toward the tent at full speed.
"Fellows, come out here!" he shouted.