It was more than sense, they soon discovered. Little paddings became quite audible, and once or twice they saw the sand scuffed up, not twenty feet away, as though by a foot passing over it.
_____________________________
Meanwhile they were climbing a rise of ground, broken by many small hummocks and dotted with thorny shrubs. On the other side, at the foot of a long down-slope, lay Ajo.
Once they reached the summit, Kendrick felt sure they could outdistance their pursuers on the descent. Already, if his watch was right, the train was preparing to pull out. It would be a breathless dash, but he was confident they could make it.
So he reassured Marjorie as best he could, and helped her on up the slope.
They were practically on the summit and already in view of the little railroad station and huddle of shacks below – when suddenly he felt himself tripped and flung violently to the ground. At the same instant, his companion emitted a scream, as she felt herself seized by invisible hands.
Leaping to his feet, Kendrick flailed out with solid fists at their attackers. Groans answered the impacts and he knew his blows were taking effect.
_____________________________
Free for a moment he dashed to Marjorie, felt for the midgets who swarmed around her. Seizing one of the invisible forms, he lifted it and flung it crashing to the ground. Another, likewise, and another.
Then he threshed his legs, where two of the creatures clung, trying to drag him down again. They flew through the air, with cries of fright.
"Well, so far, so good!" he exclaimed. "We won't wait to see if there are any more. Come on – let's go!"
"Right!"
Reaching for each other's hands, they raced down the slope.
Halfway there they saw a warning blast of steam rise from the engine, followed by a whistle.
"They'll be pulling out in a minute now!" he gasped, increasing speed. "We've got to make it! – our only chance!"
"We will make it!" she sobbed through clenched teeth, meeting his pace.
Glancing over his shoulder, after another fifteen seconds, Kendrick saw that the disc was no longer visible. Since there was no vibration he realized with relief that it was now hidden behind the slope they were descending.
"Quick – push your button!" he said, pushing his own.
They came out of the influence of the invisibility rays, raced breathless on down the slope – gained the station platform just as the train was getting under way.
Helping the exhausted girl aboard, he mounted the steps himself, led her through the vestibule into its single passenger coach.
Dropping into a seat, they sat there panting as the train gathered speed.
_____________________________
By the time the decrepit but life-saving little local drew into Gila Bend they had somewhat recovered from their harrowing experience.
Marjorie was still pale, however, as Kendrick helped her from the train.
"I may recover," she said with a wan smile, "but I'll never look the same! An old saying, but I know what it means now."
He thought better of a sudden impulse to tell her she looked quite all right to him. Instead, he said grimly:
"I know now what a lot of things mean!"
The Tucson limited would not be through for over an hour, they learned. That would give them time to hunt up the authorities and sound a warning of the ominous invader that was in the vicinity. Perhaps, by prompt military action, it might be destroyed, or at least crippled.
But first they went to the telegraph office, where Marjorie got off a message that would bring joy to her grieved family.
While standing there outside the barred window, odors of food wafting to them from a nearby lunch-room.
"Um-m!" she sniffed. "That smells good to me! I haven't tasted any earthly cooking for ages. Everything on that horrible disc was synthetic."
"Then I suggest we have ham and eggs, at once," he said. "Or would you prefer a steak?"
"I think I'll have both!"
_____________________________
As they walked into the lunch-room, Kendrick told her of the banquet in his honor Cor had promised for that night.
"I guess I didn't miss much," he ended.
"You certainly didn't!" she assured him, with a smile. "It would have opened with a purée of split-molecule soup, continued with an entrée of breaded electrons, and closed with an ionic café."
He laughed.
"I'm just as well satisfied. I was unable to attend! Humble as it is, I think this will prove to be much more wholesome food."
Night had fallen by the time they left the lunch-room. Glancing at his watch, Kendrick saw that they still had better than a half-hour before the limited was due, so they betook themselves to the police station.
It was only a block away and in consequence they weren't long reaching it.
The chief had gone home, the officer at the desk informed them, but if there was anything they cared to report, he would be glad to make note of it.
A big raw-boned westerner, he shifted his quid as he spoke and spat resoundingly in a cuspidor at his feet.
"All right, then – get your pencil ready!" said Kendrick with a smile. "This is Miss Marjorie Blake, daughter of Henderson Blake, of New York. Perhaps you read of her disappearance, a few weeks ago. And I…"
As he introduced himself and told briefly of their astounding experience, the officer's eyes bulged with amazement.
"Say, what yuh-all tryin' to hand me?" he snorted finally. "D'yuh think I was born simple?"
"Press your button!" whispered Marjorie. "Show him how the invisibility ray works. It'll save a lot of argument."
"Right!"
_____________________________
He held up his wrist.