It was the multitude of craft of all kinds hiding the wharves that gave the three thugs their advantage.

Larry Dugan was unusually skillful in handling the launch, and he had a long start of Nick Carter before the latter could get his launch around, headed for shore.

It was broad daylight, but there was a bone-racking fog on the river, and it hid the escaping boat even as it plunged in among the anchored shipping and big lumber barges that stretched for a quarter of a mile, at least.

“They can’t be far away,” said Nick, as he pushed his launch along. “Keep a bright lookout, Chick!”

“All right!”

But the rascals knew this part of the river and the peculiarities of the water front of Yonkers as well as did Nick Carter, and they got clear away.

The fog helped them materially. They might never have dodged the pursuing boat otherwise.

The detective also knew Yonkers. But, because he did know it, he was quite aware that it would not be so very difficult for Larry Dugan to elude him, especially with the fog to help.

“They’ve beaten us, chief!” grumbled Chick, a quarter of an hour later. “They’ve gone along inside this line of barges and shot out at the end. While we have been poking about here, they’ve headed down the river.”

“I think you’re right, Chick,” conceded Nick. “They’d hardly go up the river, of course. Well, we’ll go down, too. We’ve lost our prisoners, but I don’t care so much for that if they don’t get hold of Prince Marcos.”