Then, to their inexpressible joy, they saw the course of the projectile change. It was headed toward them, and a few minutes later it settled slowly to the ground about half a mile away.

"Come on!" cried Jack! "We must hurry to them, or soon it will be too dark to see them, or for them to find us. It's our last chance; don't let's lose it!"

He sprang forward, the others after him, and together they ran toward the projectile. They could see the two professors and Washington White emerging from the steel car, waving their hands.

On rushed the lost wanderers, over the rough stones, skirting the great cliffs, falling into small craters, crawling out again, just missing several times being precipitated into yawning caverns, and stumbling over petrified bodies that strewed the ground.

Ever did they hasten onward though, increasing their speed. They came to a great crater that lay between them and the projectile, but fortunately there was across the middle of it a natural bridge of stone. But it was narrow—scarcely wide enough for one at a time.

"We can never cross on that!" cried Mark, halting.

"We've got to!" shouted Jack, and he sprang fearlessly forward, fairly running over the narrow path, which had a sheer descent of thousands of feet on either side.

Mark, though fearful that he would become dizzy and fall, followed Andy. They were soon across the narrow bridge, and speeding on toward the Annihilator. Five minutes later they had reached it, and were being wildly welcomed by the two professors and Washington White, who had advanced to meet them.

"I 'clar t' goodness-gladness!" exclaimed the colored man, "I am suttinly constrained t' espress my approbation ob de deleterous manner in which yo' all has come back t' dis continuous territory."

"Do you mean you're glad to see us, Wash?" asked Jack.