"We're with you!" exclaimed both Adrian and Donald in one breath.

"Anything for excitement!"

"You're young men after my own heart!" declared Don Carlos, who was a right young man himself.

"Where are we going now?" asked Billie, seeing that they were riding back toward the firing line.

"My men are mostly in the trenches," replied Don Carlos, "but the dozen or more I have selected for this raid are in a little cantina just around the corner."

He gave his horse the spur and a moment later pulled up at the most inviting of the numerous cantinas which encircled the plaza.

"Here we are!" he exclaimed, as he leaped from his horse. "Come in and I'll introduce you to the rest of the troop."

As the boys alighted they recognized the place as the one that had played such a conspicuous part in their recent visit to Villa, but they felt sure that no one would recognize them; and even if anyone did, the revolution had completely changed conditions since that time. The only fear they had was that they would not be able to play the part they had a.s.sumed.

"Take your time," was Donald's advice, "and keep your wits about you."

"You don't suppose they'll want us to drink, do you?" asked Billie.

"I hardly think so," answered Donald. "My observation is that the average Mexican is not a drinker of anything stronger than agua frescas"-meaning by this, drinks like limeade, pina and other soft drinks.

"Oh, well," laughed Billie, "I could stand a good lemonade right now.

Let's hurry up!"

Donald's prediction was quite right, and when the boys entered they found a number of the troop just about to indulge in a _grosella_, a very palatable beverage made from currants and tasting much like the now famous grape juice. A couple of tough-looking Americans were the only ones who were drinking anything intoxicating.

"These are our new recruits," cried Don Carlos, so that all could hear.

"Here's their health!"

"_Salud!_" meaning, "your health," was the boisterous response, and in a very few minutes the boys found themselves on terms of soldierly good fellowship with the whole band, not excepting the Americans, who were the most boisterous of all.

"I don't like these fellows' looks at all," declared Adrian to Billie, the first time he got a chance to speak to him privately. "They look like a couple of outlaws."

"I expect they are," laughed Billie. "Perhaps they take us for the same."

"By George, I believe they do!" was Adrian's answer. "Now what do you think of that?"

"What do I think of what?" queried Donald, who had heard the remark.

Adrian repeated the conversation.

"Well," declared Donald, "I don't know but we are, in the eyes of anyone who don't know the facts."

"What!" exclaimed Billie. "Haven't I a right to fight for the revolutionists if I want to?"

"Sure you have; but if you are caught at it, your own government would not interfere in your behalf. If you expect the United States to protect you, you must be neutral in other peoples' battles!"

"Of course," explained Adrian, "our present position is not that."

"Oh, no!" replied Donald. "We are on a mission for our own government."

Their conversation was interrupted by the major, who, calling all the men aside, explained to them briefly that they were to go on a dangerous mission across the river into the United States.

"If it succeeds," he said, "it will not only insure the success of our cause, but will mean a goodly sum of money to each one of us."

"How is that?" asked one of the Mexicans.

"Because the work we have to do is in the interest of a large railroad syndicate, which is most anxious to have the United States intervene in the troubles in Mexico!"

"We want no intervention by the United States," declared several of the men fiercely. "Rather Francisco Madero than the American pigs!"

"You don't understand," explained one of the Americans, to whom our boys had taken such a dislike. "The Americans only want to be guaranteed--"

"We know," replied one Mexican. "We are willing to fight, but not for the Americans."

"_Bueno!_" exclaimed several.

For a few minutes it looked as though there might be a small revolution among the revolutionists, but Don Carlos was equal to the occasion and announced that no one had to go who did not want to.

"Neither will they get any of the money," he added. "Now then, all who do not wish to go may return to the trenches."

No one made a move, although there was considerable muttering.

"Now that this matter is settled," said Don Carlos, "I will go and get my final instructions. I'll be back soon."

"We seem to be getting pretty close to the facts," said Donald as Don Carlos left. "If we can only get some names we shall have all the information we need."

"We shall get those after we get a little better acquainted," said Adrian, and he proceeded to make friends with the members of the band as best he could.

Perceiving that this was the proper thing to do, Donald and Billie also began to get better acquainted and were making good progress when Don Carlos returned, accompanied by two companions, which brought the number up to twenty.

"Attention!" he called as soon as he entered the cantina.

The order was obeyed, although not in a very soldierly manner.

"The expedition is to leave for the American side in twos and threes,"

he explained, "and we are to meet at Alamita at eight o'clock tomorrow night. If any are captured, they are to allow themselves to be imprisoned without protest. No matter what happens, keep your orders secret. You understand?"

"_Bueno!_" was the unanimous reply.

"Then go!" ordered Don Carlos, and he stepped aside to allow the men to pa.s.s out.

"Stop!" exclaimed a voice from the rear of the cantina. "One thing you have forgotten!"

The boys, along with the others, turned at the sound of the voice and there in a rear door stood Don Rafael.

"Great Scott!" exclaimed Billie. "This is no place for me!" and he made a bolt for the door, followed by Adrian and Donald.

"Stop them," cried Don Rafael, who recognized them at the same instant they recognized him. "They are spies!"