CHAPTER XX

THE DIAMOND X BRAND

Nort and Dick admitted to one another, afterward, that at first they believed the two professors to be joking. They imagined that the cultured scientists were merely indulging in a bit of fun, from much of which they were necessarily barred while in the class room. But a sharp look at the faces of the men who were at the head of an expedition, conducting a mysterious search, showed the boys that earnestness was the keynote.

"You—you're going to keep us here?" questioned Dick.

"For a while, yes," said Professor Wright, and there was more snap and decision in his voice than before.

"It is much your own fault," added Professor Blair.

"Our fault!" spluttered Nort, his temper rapidly rising. "Why, what have we done except to help you when you needed it? And now all we ask is that you put us in the way of getting back to Diamond X."

"That is just it," said Professor Wright. "We don't want you to go back to Diamond X at once."

"Why not?" hotly demanded Nort. "What right have you got to hold us here? You can't! We'll get away in spite of you!" and his hand, half unconsciously, perhaps, moved toward his holster. But he was surprised to find his wrist seized in a firm grip, while he was violently swung around, his weapon being removed by some one who had come silently up behind him. And this some one was Del Pinzo, into whose sneering, crafty, swarthy face Nort angrily gazed.

Before he could say anything, Nort saw Silas Thorp slip up to Dick, and take that lad's weapon out of the holster. Dick had no time to draw it, even if such had been his intention, which, the lad said later, it was not.

"What do you mean? What's this game anyhow? What right have you to keep us prisoners here and take our guns?" shouted Nort. He took a step toward Del Pinzo, but there was something so sinister in the attitude of the half breed, albeit he did not menace the boy with the weapon, that Nort shrank back.

"I think you had better submit quietly," said Professor Blair. "We intend absolutely no violence, or ill-treatment of you, unless you make that necessary. We admit that perhaps we are acting illegally, and in an unusual manner, but, in a way, you brought this on yourselves, boys. You will not be detained long. In fact, if our plans work out right, you may depart for your ranch this evening."

"Acting illegally!" spluttered Nort. "I should say you were! We'll have you arrested for this, you—you—big——"

Then Nort stopped, for he realized that, though he might apply some well-deserved slang names to the two professors, neither of them was "big." They were small men—at least in stature.

"But you haven't any right to hold us here prisoners!" declared Dick, feeling that he must back up his brother in a firm protest. "We haven't done anything to you."

"Except to turn up where you aren't wanted!" broke in Silas Thorp. "If you'd minded your own business, and stayed away—let us alone—we wouldn't have to do this!"

In surprise at such a statement, Nort and Dick looked at the two professors.

Mr. Wright, with a wave of his hand toward his helper, to enjoin silence, made this statement:

"Mr. Thorp has put the matter rather crudely, perhaps, but that is the state of the case. Without going into details, boys, we are in this part of the country on a secret mission. We have almost accomplished what we are after, and, on the verge of the discovery, we do not wish to be balked. You happen to have stumbled upon us just when we are about to complete a wearisome search, which at least promises to be successful.

"We have enemies who would be glad to frustrate our schemes, and it is to prevent these enemies from obtaining knowledge of our movements, of our location, and the location of that which we are seeking, that we are forced to detain you. We hope soon to end our mission, and, once we have gained possession of what we are after, we shall be most happy to restore you to liberty."

He took breath after this somewhat lengthy address, and Nort and Dick looked at one another, more puzzled than before. What did it all mean? What was the queer secret of the professors, a secret that, somehow, seemed to involve Diamond X?

"Do you mean that you're keeping us here because you're afraid we'll tell something about you?" burst out Nort.

"Yes," answered Professor Blair. "We simply must keep our secret safe, now that we are on the verge of discovery."

"But we wouldn't tell!" declared Nort. "In fact we don't know anything about you—except that we've seen you once or twice. We don't know what your secret is—that is, we can only guess at it."

"That's just it!" interrupted Professor Wright. "You are the sort of lads who would make a correct guess, and then, when word of it got out, we would lose the fruits of many weary years of research."

"But we wouldn't tell anyone!" promised Dick. "All we know about it is that you're supposed to be prospecting for gold. There isn't any great crime, or secret, in that, unless you're trying to get gold off land that doesn't belong to you."

"No, it isn't gold, nor anything like gold," spoke Professor Wright, in rather dreamy tones. "It is much more valuable than gold. I never would have endured the hardships I have for mere gold."

"Nor I," said his partner, and then, for the first time the same thought came to Nort and Dick—that these men might be lunatics, obsessed with a strange idea, and that they were searching for something that might be likened to a fading mirage.

The boy ranchers looked at one another. If this was the explanation their position might be more dangerous than appeared. To be held captives by men who were mentally irresponsible, aided by an unscrupulous gang, of which Del Pinzo was a fair specimen, was not at all a reassuring thought. But Nort and Dick were not the ones to give up easily.

"Just what are you going to do?" asked Nort, when it was evident that, unarmed as they were, resistance was out of the question for the time being.

"Simply hold you here for a few days—not more than a week at most," answered Professor Blair.

"Suppose we don't stay?" asked Nort, sharply.

"Well, if you refuse to promise not to try to escape, we shall be forced to detain you as best we can," was the calm reply. "But we have no wish to use violence, and I think you will agree to submit quietly. Be our guests, so to speak."

"What if our friends come to rescue us?" asked Dick.

"Well, we have thought of that," spoke Professor Wright. "If they come we shall have to do our best to—er—persuade them to go away again—that is unless we can bring our task to an end sooner than we expect, and that is possible. If we can bring that about—make the discovery we hope for—you will be at liberty to depart at that moment. Otherwise you must stay here!"

"Well, we won't promise not to try to escape," declared Nort, hotly. "We'll do our best, not only to get away, but to bring the police down on you, or bring whatever authority they have out here. If you're going to act this way we'll be justified in doing our worst!"

"Naturally," agreed Professor Wright, smoothly. "Now that we have been made aware of your intentions we shall act accordingly. We shall be obliged to keep you under guard, but I assure you that if you do not act roughly neither will our guards. I am sorry you would not agree to our plan, and see matters in our light. It would have been so much more comfortable. And when we have explained, as we hope to do soon, you would appreciate our attitude."

"Well, all I can say now is that we don't appreciate it!" snapped
Nort, "and we'll leave at the first opportunity!"

"Then we'll see that you get no opportunities!" sneered Silas. "Let's take 'em out, Del!"

As it was evident that the two professors meant what they said, and that the boys would be roughly handled if they did not submit quietly, they followed their captors out of the dining tent, in answer to signals from Silas and the half breed that this was what was wanted.

"Here's going to be your stopping place," said Silas, with another sneer, as he stopped in front of a small tent. "And let me tell you it will be best for you to take it easy. You may get into trouble if you try to leave!"

To this Nort and Dick answered nothing. They were too angry to know what to say, but that they intended to submit quietly to this indignity was not in their natures. They cast quick glances about the camp before entering the tent, the flap of which Del Pinzo pulled back. The tent contained two cots and some small packing boxes for tables and chairs.

"All right!" said Nort, as he sized up the situation, and glanced back at the men who were his own and his brother's guards for the time being. "You can do your best to keep us here, and we'll do our best to get away. It'll be a fifty-fifty proposition!"

Nort was startled by an exclamation from Dick. The latter was gazing at some commotion on the far side of the camp. Looking out from the opened tent Nort saw being driven, along the bank of a small brook that ran through the swale, several big steers. They were being hazed along by Greasers on horses, and as the cattle splashed into the water, stopping to drink thirstily, the boy ranchers caught sight of the brands on their flanks.

It was the mark of the Diamond X ranch!