it!”

“All right! All right!” the man’s voice grumbled into the tropical air. “Then I won’t say it. All the same—”

“All the same, if you go down there we’re coming right down after you,” the girl insisted. “You know what our orders were, to fly in pairs. If one plane is disabled, its mate must go to the rescue. All other planes must go straight on. We’re on a mission of destruction. That’s all we know. It’s urgent. We must go through!”

“Okay, sister, that’s why you should fly right on.”

“But we won’t.” The girl spoke quietly. “If you crack up, we’ll be right down. This ship has control. I can land her on a dime.”

“But don’t forget—”

“I never forget,” the girl snapped. “Now go on down there and try your luck. It’s all that’s left to do.”

“What’d he mean—secret?” The blonde-haired girl who sat in the co-pilot seat beside the girl who had carried on that spirited conversation, drawled, “What secret?”

“Sorry, Janet,” was the slow reply. “You’ve heard of military secrets, I suppose?”

“For Pete’s sake, Mary Mason! Yes! Of course, I have, but I don’t see—”

“This is one of them.” Mary Mason, the little girl who piloted a big plane, favored her with a smile.

After that, save for the slow drone of motors, there was quiet in the cabin, a tense sort of calm, such as comes before a storm. After a time the blonde-haired Janet said:

“Sparky’s motors didn’t stop all by themselves.”

“Of course they didn’t. Sparky’s too good a pilot for that.”

“He sure is. It’s the work of the enemy. That’s what it is. He knows. He’s after us, after you and Sparky, Don and me. He’s got us coming down in a jungle and we’re only just out of good, old U.S.A. And think of the dizzy miles still ahead of us! And the enemy dogging our luck all the way!”

“I thought of him before I started,” Mary replied quietly. “Let him do his worst. We’ll win, you’ll see!”

For the swift, powerful twin-motored transport plane flown by Mary Mason, the distance to that native clearing on the Rio Branco was just a jump, but she did not jump. Instead she followed doggedly on behind her limping companion. And as she followed, she found time to think. Those were long, long thoughts.

She was a member of the WAFS, Women’s Auxiliary Ferrying Squadron, this slender girl with the flashing black eyes and trigger-quick fingers. For six wintry months she had flown planes from east to west, from north to south, and all the way back again. Sometimes these planes were transport planes or bombers with comfortable, heated cabins. More often they were open-seated trainers or fighters. She flew them in wind, rain, and snow. Mile after weary mile in lonely solitude she had gone roaring through the night sky to arrive at last at her destination only to be ushered aboard an airways plane and hurried back again.

“It was hard,” she said to Janet Janes, her companion.

“Sure it was,” the other girl agreed. “Looks as if this would be harder.”

“Perhaps,” Mary answered. “But just think! In the past two days it’s been San Francisco to Denver, to Chicago, to Miami!”

“To Caracas, and then to the heart of a jungle where headhunters beat on hollow logs inviting their friends to a feast.” Janet laughed in spite of herself.

“This will be just a pause,” Mary insisted stoutly. “After that it will be Para, to Dakar in Africa, Dakar to Egypt and the pyramids, Egypt to Persia—”

“Under the Persian moon,” Janet sang softly.

And then:

“Watch!” Mary exclaimed. “There’s the clearing. Sparky has spotted it. He’s preparing to circle. He’s going down!”

Suddenly Mary set her motors thundering. After climbing steeply she leveled off to stare down at the clearing.

“He didn’t go down, not yet,” Janet informed her.

“No. There are people running from that row of native huts. He’d hit them.”

“They’re like ants coming from an ant hill. They don’t seem important.”

“Oh! But they are!” Mary exclaimed. “Every human life is important. Besides, if Sparky killed just one of them, our lives wouldn’t be worth a penny. We’re in the wilds.”

“Probably not a white man within a hundred miles.”

“Or perhaps a thousand.”

“I wish we might go on.” A suggestion of strain crept into Janet’s voice.

“Oh! But we can’t.” Mary’s plane was circling slowly now.

“Of course we couldn’t go on,” she told herself. “Not even if Sparky insisted.”

Through her racing mind whirled memories of other days, those bad days of winter convoy in America. There had been only twenty-five of them, twenty-five WAFS, and so much work to do. Always, on her return from a long, hard trip, muddy, chilled through and half-starved, if he chanced to be in, she had found Sparky waiting in his car to whisk her away to her barracks and after that to a glorious hot meal. “Thick, juicy steaks, French fries, lemon pie, and barrels of hot coffee,” she whispered.

And now Sparky was down there below her in his disabled plane waiting, waiting for the last darting spot to glide from those huts into the bush that lay beyond. No, they could not go on. “Not even for the secret—” she spoke aloud, then checked herself just in time.

“He can’t climb,” she said to Janet. “He can only circle. And if his other motor quits he may go crashing straight down!”

“There!” Janet breathed. “Now there’s no one!”

“Yes, just one more.”

A very small black spot, moving, oh, so slowly, went weaving this way, then that, toward the forest.

“A child!” Mary exclaimed. “How Sparky would hate hitting a child!”

“Now!” Janet breathed.

“No,” Mary groaned. “One more, a smaller one.”

It seemed an eternity before this last child had reached safety.

Of a sudden the plane beneath them lunged downward.

“There they go!” Janet gasped while Mary’s clutching fingers fairly bit into the stick.

But no, Sparky’s plane seemed to shudder. No doubt his motor had quit, then gone on again.

“Why doesn’t he go down?” Mary groaned. “Here, take the plane!” She gave Janet her place. “Just circle slowly.”

With long, swift strides she reached the plane’s door. There she braced herself, then stood watching the plane below.

“He’s going down,” she whispered.

It was true. Circling slowly, cautiously, Sparky nursed his disabled plane at last into a smooth glide that brought him swiftly down.

“He’s out too far,” she groaned. “He’s afraid there’s just one more native child.

“There!” she exclaimed. “He’s down!”

She saw the big plane bump hard, then bump—bump again. It did not heel over, but went gliding straight on.