Both Frank and Barney saw that a struggle was going on in the other cab. They could hear Inza crying for some one to let her go, and the sound of her voice made Frank more desperate than ever.

“The scoundrel!” he panted, trying to tear open the door and spring out. “I’d like to choke the breath of life out of him! If he harms her, I will.”

“Thot’s roight, me b’y!” shouted Barney. “We’ll give it to th’ spalpeen!”

Then the driver of the other cab whipped up his horses, and away they dashed getting in ahead of the one carrying Frank and Barney.

“They are making for the harbor!” grated Frank. “That is how it happens we came upon them.”

“Roight again, as ye always are,” agreed Barney.

Frank thrust his head out of the window and shouted to the driver.

“After them! after them! Don’t let them get away, on your life!”

“After who?” asked the driver.

“That cab!” flashed back Frank. “Are you dazed or drunk? Whip up, man—whip up!”