The outlaw leader quailed. Then he turned and made a sign to his men. The last one of them placed his gun on the ground.

“March,” came the inflexible order. “Down that path to the left, so we can keep you in view. You will find your weapons safe when you return and we are gone. Go!”

The menace of the powerful magazine rifle cowed the outlaw gang. The breathless spectators from the brush saw them join their leader unarmed, take the path as directed, and file away from the plateau.

The person who had so marvellously accomplished all this never lowered his weapon. Still holding it ready for instant use, he walked over to where a ledge of rocks rose like a sentinel tower above the level of the plateau. There posting himself, he held the discomfited retreating foe in constant sight. He swung his hand towards the stupefied crew of the airship. He spoke some order or suggestion to them that Dave did not overhear. The party, however, at once possessed themselves of some of the abandoned rifles of the outlaws and stood ready for attack and defence.

Mr. King arose and hurried over to where Professor Leblance stood, and Dave and Hiram followed him.

“Professor!” cried the airman. “Here are some strange happenings. Who is that person—not one of the crew?”

“I never saw him before,” replied the dazed Frenchman. “He has saved us.”

“And the Albatross. We have the quicksilver. This is a dangerous ruffian-infested district. Let us leave as soon as possible.”

“Yes, yes,” said the Frenchman, in a hurried tone. “After what has happened we cannot be too quickly nor fast on our way.”

The animated engineer of the Albatross bustled about into immediate action. He ordered two of his men to join their rescuer on the rocks. All the others were impressed into service in assisting to get the giant airship ready for a new and longer flight.