"It's only a question of whose horses are the best," said Mr. Black. "And now let us to cover."

Leaving the highway, the Americans turned sharply to the left and dashed for the shelter of a piece of woodland something like a half a mile away. Pell-mell they went over rocks and shrubs, regardless of themselves or their horses, and succeeded in reaching the friendly cover just about three minutes before the cavalry came into sight over the hill.

"We're all right now," said Mr. Black, "if the troopers will stick to the road, but if they should take it into their heads to scatter, we might have trouble."

With eager eyes the boys watched the oncoming horsemen, prepared to flee for their lives if they should be discovered, as they realized how useless would be any resistance.

Nearer and nearer they came until the leaders were at the very spot they had just left, and then with a rush they passed by, turning neither to the right nor to the left.

Every one in the party heaved a deep sigh of relief.

"It's a wonder some of them didn't stop," said Billie.

"Oh, I don't know," laughed Adrian. "Look yonder," and he pointed to the brow of the hill, where another, but much smaller body of horsemen had appeared. "They evidently didn't intend to have their mission interfered with by fighting a rear-guard skirmish."

"I think the best thing we can do," said Mr. Black, "is to surrender ourselves to the pursuers. They are evidently Carranzistas and our passes will protect us."

Breaking off a piece of bamboo, Mr. Black tied a handkerchief to it and raising it above his head the little party rode out of the woods. They were sighted at once and a party of horsemen dashed toward them, and surrounded them.