"Mother is always right," cried the children, as they wended their way back to camp.

Early the next morning, as they were moving over the prairie, a beautiful vision burst on their sight. It was a mirage of the prairie. As the sun rose in all the splendor of an unclouded sky in the east, the objects in the west became suddenly elongated vertically, the long rank grass stretching to an amazing altitude, while its various hues of green were reflected with vivid accuracy. As the emigrants approached the optical illusion, it gradually contracted laterally above and below towards the centre, at the same time rapidly receded towards the horizon, until it assumed its original aspect. As the sun approached the meridian, the atmosphere become so intensely warm that Mr. Duncan thought it prudent to rest until it began to descend, to which they all joyfully assented, as their oxen appeared to be almost overcome with the heat. They had been a day and a half on the prairie, and as the water they brought with them would not last them longer than the next morning, they were anxious to make the distance to the hills, which were looming faintly before them in the west, where they were sure of finding an abundant supply. Accordingly, the oxen were turned loose, the horses and mules being picketed, and all resigned themselves to the disagreeable necessity of an encampment in a burning noonday sun on the prairie, with not even a shrub to shelter them from its rays. But there was no help for it, the oxen could not proceed with the wagons, and they were obliged to wait until the heat of the day was over.

Towards evening, a light breeze began to stir the heated air, and borne on its wings, came also a disagreeable odor caught only at long intervals, but which served to put Howe and Mr. Duncan on their guard.

"There is a fire on the prairie, away at the north," said Howe, "and there is not a moment to be lost, if we would save our baggage, cattle, or even our lives!"

"It is true, there is fire, and now I see the smoke away yonder, looking like a thin mist against the sky; should it blow this way, our only refuge is the Sand Hills, that I know lay yonder towards the forest," said Mr. Duncan, looking intently towards the point whence the odor came.

"Saddle the horses and mules, boys," said Mr. Duncan, "and place Mary and the children on them. Benny, you must ride with your mother, I am afraid to trust you alone on a mule chased by fire. You must sit still, my boy, and keep up your courage; the Sand Hills are yonder, not more than three miles over the plain; you see them, Mary," he continued, "but do not mind the trail; keep your horses headed direct for them, and ride for your lives. I do not think there will be any danger for any of us; but it is better to make all ready for the worst."

"But, suppose you, with the oxen, wagons, and cows, are surrounded with fire," said Mrs. Duncan.

"We will do our best in the emergency. But I hope to gain the hills in safety. Perhaps the wind will shift and blow the fire in another direction. We must hope for the best, doing everything in our power for our safety. Now go; give the horses and mules a loose rein."

And away over the plain the cavalcade went, followed by the wagon as fast as the oxen could travel, but the progress they made was slow in comparison to that of the fire. On it came, and on went the cattle, goaded by the drivers at first, but at last catching sight of the heavy, rolling wave of fire that was sweeping towards them, they started into a gallop, frightened and seeming to comprehend the danger that menaced them. Mr. Duncan saw his wife and children gain the Sand Hills in safety, and then the smoke and half consumed grass filled the air, hiding the rescued from view as the burning wave swept toward them, maddening the oxen and making the stout hearts of the pioneers quail, as the burning fragments eddying through the air, fell thick and fast among them. Prairie dogs, in droves went howling past, wolves and panthers laying their bodies close to the ground in their rapid leaps, heeded not each other, and even an antelope joined in the flight unmolested, from their common foe. Innumerable prairie fowls filled the air with their cries; but, above every other sound arose the roar and crackling of the scorching billowy mass, as on, still on it came, now rising until its seething flame seemed to touch the sky, then falling a moment only to rise the next still higher.

A prairie on fire is a sublime spectacle, which those who have had the good fortune to see, in a place of safety, will not soon forget. But a horrible ordeal it is for those who are overtaken by the raging flame; for, if the grass is dry, with a slight breeze to fan the flame, it travels with the speed of a whirlwind.