When the last of the light was gone they lit a small lamp that Sarnak had given them. It illumined a circle some twenty feet across, a little patch of light in the midst of the utter blackness of the depths of the sea. They sat there talking for a while, then Gerry stretched out on the sand with one arm hooked around a lump of coral to hold himself in place. He was thankful that the waters of Venus were always warm. It would scarcely have been possible to sleep at the bottom of one of Earth's oceans in this manner, even with the equipment with which Sarnak had supplied them. For a while Gerry drowsed. The audiphones of his helmet picked up all the faint sounds of this watery world. A muffled splash as Angus McTavish stirred restlessly ... the steady movement as their drowsing but apparently sleepless dolphins fed on the fields of sea-weed ... an occasional steady churning as some larger denizen of the deep swam past above them. Then he slept. * * * * * It was well past midnight by the illuminated dial of the waterproof chronometer that Sarnak had given Gerry when he awoke. Angus was shaking his shoulder. The light had been put out hours before, and there was no illumination at all except for an occasional flash of green phosphoresence where some fish sped by. "Either I'm an over-grown sponge," the big engineer muttered, "or there's a light shining through the water off to the west." Gerry yawned and sat up, instinctively starting to rub his eyes before his hands bumped against the hard glass surface of his curving helmet. Some of the bits of coral around them glowed with an eerie green radiance, and a tall frond of sea-weed had tiny specks of light on the tips of its constantly waving leaves. Then, far off to the left, Gerry caught a faint glow. It was hard to tell what kind of a light it was, so great was the refraction of the water, but there was something there. It was little more than a lessening of the deep gloom that otherwise surrounded them on all sides. Gerry got to his feet and picked up his rubber saddle which he had been using as a pillow under his helmet. "We'd better investigate," he said. "Wake Closana." They saddled their dolphins and rode out at an easy pace, holding the big fish down with a tight rein. As they rode the glow ahead of them became more definite. It seemed to come from a long row of twenty or more lights. Then they were near enough to see each other in the reflected glow. "It's some kind of a ship," Gerry said. "Those lights are her port holes!" "It's more than that!" snapped Angus. "It's the _Viking_! I know the lines of her stern anywhere, even in this sunken and God forsaken spot!"