They turned back into the arroyo, and found an easy road there. The banks were several feet high, and, as the dusk still hung on the plain, they increased their speed, counting each moment worth one man's life. They came soon to a place where the gully was shallower than usual, and then they saw two or three faint lights in the plain before them, apparently about a half mile away. Middleton raised a warning hand, and they stopped.

"Those are the lights of the train," he said. "They undoubtedly have scouts out, and of course they have seen the signals of the Comanches and the Mexicans, just as we have, but they do not know as much as we do. I think we had better go down the arroyo as far as we can, and then, if the alarm is sounded by our enemies, gallop for it."

"It iss our choice because there iss none other," said Arenberg.

They continued, but more slowly, in order to make as little noise as possible. They had covered more than half the distance when Phil saw a faint line of gray on the horizon line in the east. The next moment against the background of gray appeared a horseman, a man of olive skin, clad in sombrero, bright jacket, embroidered trousers, and boots with great spurs. He carried a weapon like a spear, and Phil knew at once that he was a Mexican lancer, no doubt a sentinel.

The man saw them, and, instead of attempting to use his lance, snatched a pistol from his belt and fired point blank. The bullet passed by Middleton's face, and, like a flash, Bill Breakstone replied with a bullet from his rifle. The Mexican went down, but from three points of the compass came cries, the shouts of the Mexicans and the long war whoop of the Comanches.

"Forward for your lives!" cried Middleton, and, dashing out of the arroyo, they galloped at full speed toward the wagon train.

CHAPTER IX

THE FIERY CIRCLE

The thin gray light in the east broadened into a bar as the hoofbeats of the four thundered over the plain. From left to right came shouts, the yells of the Indians and the fierce cries of the Mexicans.

"Bend low," cried Middleton, "and we may escape their bullets!"