* * * * * I leaped into the pool and adjusted the antenna on her head, making sure that the four electrodes of the crossed curved members pressed against the front and back and both sides of her head. Then, hastily, I climbed out of the pool, seated myself on its edge, and put on my own antenna. Perhaps I should say at this time that Mercer's device for conveying thought could do no more than convey what was in the mind of the person sending. Mercer and I could convey actual words and sentences, because we understood each other's language, and by thinking in words, we conveyed our thoughts in words. One received the impression, almost, of having heard actual speech. We could not communicate with the girl in this fashion, however, for we did not understand her speech. She had to convey her thoughts to us by means of mental pictures which told her story. And this is the story of her pictures unfolded. First, in sketchy, half-formed pictures, I saw her return to the village, of her people; her welcome there, with curious crowds around her, questioning her. Their incredulous expressions as she told them of her experience were ludicrous. Her meeting with her father and mother brought a little catch to my throat, and I looked across the pool at Mercer. I knew that he, too, was glad that we bad put her back into the sea when she wished to go. * * * * * These pictures faded hastily, and for a moment there was only the circular swirling as of gray mist; that was the symbol she adopted to denote the passing of time. Then, slowly, the picture cleared. It was the same village I had seen before, with its ragged, warped, narrow streets, and its row of dome-shaped houses, for all the world like Eskimo igloos, but made of coral and various forms of vegetation. At the outskirts of the village I could see the gently moving, shadowy forms of weird submarine growths, and the quick darting shapes of innumerable fishes. Some few people were moving along the streets, walking with oddly springy steps. Others, a larger number, darted here and there above the roofs, some hovering in the water as gulls hover in the air, lazily, but the majority apparently on business or work to be executed with dispatch. Suddenly, into the midst of this peaceful scene, three figures came darting. They were not like the people of the village, for they were smaller, and instead of being gracefully slim they were short and powerful in build. They were not white like the people of the girl's village, but swarthy, and they were dressed in a sort of tight-fitting shirt of gleaming leather--shark-skin, I learned later. They carried, tucked through a sort of belt made of twisted vegetation, two long, slim knives of pointed stone or bone. * * * * *