With Lura at his heels, he passed through the rent in the tapestry and entered the secret passage through the walls. The way twisted and turned interminably, but finally he paused before a door. Before opening it he slid back a panel which opened a peep-hole and looked out. "The ship is there," he whispered in a voice of relief. "There is only one guard over it that I can see. Why didn't I think to bring Glavour's weapons? I'll have to try to catch him by surprise. When I open the door, run straight for the space ship as though you were trying to escape from me. Don't try to dodge the guard, keep right on for the ship. As soon as I overpower the guard, get in the ship and hold your hand on the starting lever. When I get on board, throw in the power at a low rate. We don't want to rise rapidly enough to get out of easy control. Do you understand?" "Yes, Damis," she whispered. * * * * * He watched until a sudden shout drew the attention of the sentry momentarily away from the ship he was guarding. A confused sound of cheering came from the palace and the sentry looked toward the western heavens. A moment of gazing and he raised his voice in a raucous shout of joy. Instantly Damis swung open the door. Lura sped out like a frightened deer with Damis in close pursuit. The attention of the sentry was fixed on some distant object in the sky and he did not see the oncoming pair until Lura was only a few yards from him. The sound of her footsteps attracted his attention and he glanced down at her. An expression of surprise came over his heavy features and he reached for a weapon. His gesture was never finished, for Damis' fist caught him under the ear and he dropped in his tracks. Damis looked in the direction in which the sentry had been staring and a cry broke from his lips. "The fleet of Tubain!" he cried. A thousand yards in the air and a scant five miles to the west was a clump of half a dozen Jovian space flyers. Massed behind them were a hundred more. They were approaching with tremendous velocity. Damis gave a mighty bound and leaped through the airlock of the ship. Hardly had he cleared the door than Lura pulled down the starting lever. The ship flew up from the ground. Hardly had it left its ways than a momentary flash came from the hill east of the palace. The air grew black around them and a cold as of interstellar space penetrated their very bones. In an instant the ship had flashed up into the sun above the zone of influence of the Martian weapon. The shouting from the palace was suddenly stilled. Damis looked down, but nothing could be seen save a pall of intense blackness over the ground where the building stood. "The port motor, Lura!" cried Damis. The Jovian fleet was approaching so rapidly that a collision with the nearest flyer seemed inevitable. There was a roar from the air as Lura threw in the port blast with its maximum power. Damis was hurled against the side of the ship.