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grasped the situation, and acted quickly, as she always did in an emergency.

"Are you sure, Grace?" she asked. She could speak without fear of the men in the racing boat overhearing her, for they had thrown out their clutch, a moment later letting it slip into reverse, and the churning propeller, and the throb of the motor, made it impossible for them to hear what was said aboard the Gem. "Are you sure, Grace?" repeated Betty.

"Well, almost. Of course I only had a glimpse of them, but I have good cause to remember them."

"Don't say anything now, then," suggested Betty. "We will wait and see what they say. Later we may be able to make sure."

"All right," Grace agreed, looking intently at the two young men. They seemed nice enough, and were smiling in a pleasant, frank manner at the outdoor girls and Aunt Kate. The two