she slowed down, for she caught a motion that indicated that the two
young men in the boat wished to speak to her.

As they came nearer Grace uttered an exclamation.

"What is it?" asked Mollie.

"Those young men-- in the boat. I'm sure they're the same two who were
in the auto that made Prince run away! Oh, what shall I do?"

CHAPTER XIII

CRACKERS AND OLIVES

Betty 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."