The catastrophe cannot be told in detail. It may have been partly my fault, for my guard was lax at the moment. Before I realized what had happened Miss Drane was gone and I was in the water clinging to the upturned boat. A sucking, gurgling whirlpool was moving down the stream, and the cable line had disappeared. For a moment a cold horror crept to my vitals and chilled me so that I could not move. Then my duty swept over me with a swift rush, and, letting go the boat, I dived desperately. Madly I swept my arms to left, right, everywhere, grasping blindly for the touch of flesh or clothing. Dimly I seemed to realize that I was in a measure responsible for the accident, and that I must find the lost girl. Back and forth I fought through the water savagely, my lungs hurting, my head throbbing. I could not give up. I had to find her. She was there, somewhere in that silent, treacherous element. Into my chaotic mind leaped the thought that perhaps she had risen to the surface. Instantly I ceased my efforts and rose. Dashing the streaming drops from my eyes and mouth I gulped in a deep breath, and glared around despairingly. Silence; solitude; a shining, disc-like spot where the reflection of the sun lay, and a dozen feet off the glistening bottom of the boat. That was all. A man's length to the south I saw some bubbles rise and burst. There can be no bubbles without air. Maybe-- Resurgent hope filled my breast as I plunged downward again, striking out with all my might. I grasped a sodden something. I opened my eyes. The water was clear and the sunlight filtered dimly through it. A confused shadowy shape confronted me. I could get no outlines. An instant later I touched a hand, and knew it was Beryl Drane. A conception of the truth came then. When the fish, or whatever it was, had dragged her overboard, she had become entangled in the lines, and the thing which had power to pull her from the boat likewise had power to hold her below the surface while it struggled to escape. I clasped her in my arms, gave a tug, and together we shot upward. I looked at her as we reached light and air. She was limp, and to all appearance perfectly lifeless. Her lips had a bluish tinge, and were parted the least bit. Her eyes were half closed; she did not breathe.