There was but little conversation in the car as it roared on, leaping and careering over rocks and obstructions like a small boat in a heavy sea. The Motor Rangers were engaged in the most desperate race of their lives. As they sped along the eyes of all were glued on the trail ahead, with its towering walls of mighty pines and about whose bases chaparral and inflammable brush grew closely.

The air was perceptibly warmer now, and once or twice a spark was blown into the car. Not the least awe-inspiring feature of a forest fire in the mountains is the mighty booming of the great trunks as they fall. It is as impressive as a funeral march.

"Ouch, somebody burned my hand!" exclaimed Joe suddenly.

But gazing down he saw that a big ember had lit on the back of it. He glanced up and noticed that the air above them was now full of the driving fire-brands. Overhead the dun-colored smoke was racing by like a succession of tempest-driven storm clouds. A sinister gloom was in the air.

Suddenly, Cal, who had been half standing, gazing intently ahead, gave a loud shout and pointed in front of them. The others as they gazed echoed his cry of alarm.


CHAPTER XXII.
A DASH THROUGH THE FLAMES.

The object thus indicated by Cal was in fact about as alarming a thing as they could have encountered. It was nothing more or less than the smoking summit of a big tree a few hundred feet ahead of them. As they gazed it broke into flame, the resinous leaves igniting with a succession of sharp cracks like pistol shots. In a second the tree was transformed into the semblance of an immense torch. Driven by the wind the flames went leaping and rioting among its neighbors till all above the Motor Rangers was a fiery curtain stretched between them and the sky.

To make matters worse, the smoke, as acrid and pungent as chemical vapor, was driven in Nat's eyes, and he could hardly see to drive. His throat, too, felt hot and parched, and his gloves were singed and smoking in half a dozen places.