Bright-eyed, eager for the adventure trail, Johnny swung the propeller of the Thunder Bird over three times and turned to Cliff. "Here's where you learn one of the joys of flying. Hold her there while I climb in. When I holler contact, you kick her over--if you're man enough."
Cliff smiled, dropped his cigarette and ground it under his heel, then reached up and grasped the propeller blade. "I never actually did this, but I've watched others do it. I suppose I must learn. Oh, before we go up, I ought to tell you that I'd like to go on over the line this morning if possible. If you can fly very high, and when you near the line just glide as quietly as possible, I think it can be managed without our being seen. And since it is only just daylight now, it should not be late when we arrive."
"It should not," Johnny agreed. "Arriving late ain't what worries a flyer--it's arriving too doggone unexpected. Where do we light, in Mexico? Just any old place?"
"Straight toward Mateo's camp, first--flying very high. From there on I'll direct you. Shall we start?"
"You're the doctor," grunted Johnny, not much pleased with Cliff's habit of giving information a bit at a time as it was needed. It seemed to betray a lack of confidence in him, a fear that he might tell too much; though how Johnny could manage to divulge secrets while he was flying a mile above the earth, Cliff had probably not attempted to explain.
Because he was offended, Johnny gave Cliff what thrills he could during that flight. He went as high as he dared, which was very high indeed, and hoped that Cliff's ears roared and that he was thinking pleasant thoughts such as the effect upon himself of dropping suddenly to that sliding relief map away down below. He hoped that Cliff was afraid of being lost, and of landing on some high mountain that stuck up like a little hill above the general assembly of dimpled valleys and spiny ridges and hills. But if Cliff were afraid he did not say so, and when the double-pointed hill that Johnny had reason to remember slid toward them, Cliff pointed ahead to another, turned his head and shouted.
"See that deep notch in the ridge away off there? Fly toward that notch."
Johnny flew. The double-pointed hill drifted behind them, other hills slid up until the two could gaze down upon their highest peaks. Beyond, as Cliff's maps had told him, lay Mexico. At eight thousand feet he shut off the motor and glided for the notched ridge. The patrol who sighted the Thunder Bird at that height, with no motor hum to call his attention upward, must have sharp eyes and a habit of sky-gazing. Cliff, peering down over the edge of the cockpit, must have thought so, for he laughed aloud triumphantly.
"Fine! I think we are putting one over on my friends, the guards," he cried, with more animation than Johnny had yet observed in him. Indeed, it occurred to Johnny quite suddenly that he had never heard Cliff Lowell laugh heartily out loud before. "How far can you keep this up--without the motor?"
"Till we hit the ground," drawled Johnny, who was enjoying his position of captain of this cruise. He had been taking orders from Cliff for about forty-eight hours now without respite save when he slept, and even his sleep had been ordered by Cliff.
"I could make that twelve miles or so from here, though. Why?"
"In the twelve miles you would not be using gas--could you glide to the ridge, circle and fly high again, and back to Mateo's camp without stopping for gas?"
Johnny gave a grunt of surprise. "I guess I could," he said. "Why?"
"Then do it. Just that. On this side of the notch you will see--when you are close enough--a few adobe buildings. I want to pass over those buildings at a height of, say, five hundred feet; or a little lower will be better, if you can make it. Then circle and come back again. And try and make the return trip as high as you did coming down, until you are well past those mountains we passed over, just inside the line. Then come down at camp as inconspicuously as possible. I may add that as we pass over the buildings I mentioned, please start your motor. I am not expected at just this time, and I wish to attract attention."
"Hunh!" grunted Johnny. "You'd sure attract attention if I didn't--because how the deuce would you expect me to climb back from five hundred feet to eight thousand or so, without starting the motor?"
Cliff did not answer. He was busy with something which he had brought with him; a square package to which Johnny had paid very little attention, thinking it some article which Cliff wanted to have in camp.
Evidently this was not to be a news-gathering trip, though Johnny could not see why not, now they were over here. Why just sail over a few houses and fly home? He could see the houses now, huddled against the ridge. A ranch, he guessed it, since half the huddle appeared to be sheds and corrals. A queer place to gather news of international importance, thought Johnny, as he volplaned down toward the spot. He threw in the motor and was buzzing over the buildings when Cliff unstrapped himself, half rose in his seat and lifted something in his arms.
"Steady," he cried. "I want to drop this over." Whereupon he heaved it backward so that it would fall clear of the wing, and peered after it through his goggles for a minute. "You can go home now," he shouted to Johnny, and settled down in his seat with the air of a man who has done his duty and has nothing more on his mind.
Mystified, Johnny spiraled upward until he had his altitude, and started back for the United States. Clouds favored him when he crossed the boundary, hiding him altogether from the earth. Indeed, they caused him to lose himself for a minute, so that when he dropped down below the strata of vapor he was already nearly over the double-pointed hill that was his landmark. But Cliff did not notice, and a little judicious manoeuvering brought him into the little valley and headed straight for the oak, easily identified because Mateo was standing directly in front of it waving a large white cloth.
They landed smoothly and stopped exactly where Johnny had planned to stop. He climbed out, Cliff following more awkwardly, and the three of them wheeled the Thunder Bird under the oak where it was completely hidden.
It was not until he had come out again into the warm sunshine of mid-morning that Johnny observed how the kiddies were playing their part. They had a curious little homemade wheelbarrow rigged, and were trundling it solemnly up and down and over and around the single mark made by the tail drag. A boy of ten or twelve rode the barrow solidly and with dignity, while a thin-legged girl pushed the vehicle. Behind them trotted two smaller ones, gravely bestriding stick horses. Casually it resembled play. It would have been play had not Mateo gone out where they were and inspected the result of stick-dragging and barrow-wheeling, and afterwards, with a wave of his hand and a few swift Mexican words, directed them to play farther out from the oak, where the Thunder Bird had first come to earth. Solemn-eyed, they extended the route of their procession, and Johnny, watching them with a queer grin on his face, knew that when those children stopped "playing" there would be no mark of the Thunder Bird's landing left upon that soil.
"I've sure got to hand it to the kids," he told Cliff, who merely smiled and pulled out his cigarette case for a smoke.
