“Yes, I think it would be a good plan to take a look there,” said Mr. Howbridge to Ruth in a low voice. “Especially if the children are out of the way. I don’t suppose it could by any chance be the same men, but—”

“Look!” suddenly exclaimed Ruth, pointing to something moving behind a screen of bushes that hung over the river near the eddy. As she spoke the bushes parted and a motor boat shoved her bow out into the stream. In another instant the boat came fully into view, and there was revealed as occupants two roughly dressed men. They gave one quick glance along the bank toward Ruth and Mr. Howbridge, and then while one attended to the wheel the other sprang to the engine to increase the speed.

There was a nervous spluttering from the motor, and the boat shot out into the river, the two men in her crouching down as though they feared being fired at.

“There they are!” cried Ruth, clasping Mr. Howbridge’s arm in her excitement. “The same two men!”

“Are you sure?” he asked.

“Well, they’re the same two we saw down near the canal lock, in the boat,” Ruth went on. “I’m sure it’s the same boat, and I’m as positive as I ever was that they are the ones who robbed us.”

“It is the same boat we saw the other day,” agreed the lawyer. “And I think the same men. Whether they are the thieves is, of course, open to question. But I should very much like to question them,” he added. “Hold on there!” he called to the men. “I want to see you!”

But the boat did not stop, rather she increased her speed, and it seemed that one of the men laughed. They did not look back.

“I wish there was some way of taking after them!” exclaimed Ruth’s guardian. “But, as it is, it’s out of the question.”

They were on a lonely part of the river. No houses were near and there was no other boat in sight, not even a leaky skiff, though some farmer boy might have one hidden along the shore under the bushes. But a rowing craft would not have been effective against the speedy motor boat, and finding another craft to match the one containing the two rough men was out of the question.