They were over land, a rocky coast that shot behind them as great jagged mountains, tipped with snow, rose beneath. Suddenly, a shining apparition appeared from behind one of the neighboring hills, and drove down at them with an unearthly acceleration. Arcot moved just enough to dodge the blow, and turned to meet the ship. Instantly, now that he had a good view of it he was certain it was a Thessian ship. Waiting no longer to determine that it was not a ship of this world, he shot a molecular beam at it. The beam exploded into a coruscating panoply of pyrotechnics on the Thessian shield. The Thessian replied with all beams he had available, including an induction-beam, an intensely brilliant light-beam, and several molecular cannons with shells loaded with an explosive that was very evidently condensed light. This was no exploration ship, but a full-fledged battleship. The _Ancient Mariner_ was blinded instantly. None of the occupants were hurt, but the combined pressure of the various beams hurled the ship to one side. The induction beam alone was dangerous. It passed through the outer lux-metal wall unhindered, and the perfectly conducting relux wall absorbed it, and turned it into power. At once, all the metal objects in the ship began to heat up with terrific rapidity. Since there were no metallic conductors on the ship, no damage was done. Arcot immediately hid behind his perfect shield--the space-distortion. "That's no mild dose," he said in a tense voice, working rapidly. "He's a real-for-sure battleship. Better get down in the power room, Morey." In a few moments the ship was ready again. Opening the shield somewhat, Arcot was able to determine that no rays were being played on it, for no energy fields disclosed as distorting the opened field, other than the field of the sun and planet. Arcot opened it. The battleship was searching vainly about the mountains, and was now some miles distant. His last view of Arcot's ship had been a suddenly contracting ship, one that vanished in infinite distance, the infinite distance of another space, though he did not know it. Arcot turned three powerful heat beams on the Thessian ship, and drove down toward it, accompanying them with molecular rays. The Thessian shield stopped the moleculars, but the heat had already destroyed the eyes of the ship. By some system of magnetic or electrostatic locating devices, the enemy guns and rays replied, and so successfully that Arcot was again blinded. He had again been driving in a line straight toward the enemy, and now he threw in the entire power of his huge magnetic field-rays. The induction ray disappeared, and the heat, light and cannons stopped.