The Sea Lion towed the Shark all through the night, keeping to an easterly direction with the idea of going to Hongkong, something over 150 miles away. All along the eastern coast of Kwang Tung, from the slender peninsula which separates the Gulf of Tongking from the China Sea to the bay which penetrates almost to Canton, there is a succession of little islands, so the submarine and her prize were always in sight of land.