It had the form of a man, except that it walked, or rather rolled, upon all fours, and its legs were the same length as its arms, giving them the appearance of the four legs of a beast. Yet it was no beast that Dorothy had discovered, for the person was clothed most gorgeously in embroidered garments of many colors, and wore a straw hat perched jauntily upon the side of its head. But it differed from human beings in this respect, that instead of hands and feet there grew at the end of its arms and legs round wheels, and by means of these wheels it rolled very swiftly over the level ground. Afterward Dorothy found that these odd wheels were of the same hard substance that our finger-nails and toe-nails are composed of, and she also learned that creatures of this strange race were born in this queer fashion. But when our little girl first caught sight of the first individual of a race that was destined to cause her a lot of trouble, she had an idea that the brilliantly-clothed personage was on roller-skates, which were attached to his hands as well as to his feet. "Run!" screamed the yellow hen, fluttering away in great fright. "It's a Wheeler!" [Illustration: "IT'S A WHEELER!"] "A Wheeler?" exclaimed Dorothy. "What can that be?" "Don't you remember the warning in the sand: 'Beware the Wheelers'? Run, I tell you--run!" So Dorothy ran, and the Wheeler gave a sharp, wild cry and came after her in full chase. Looking over her shoulder as she ran, the girl now saw a great procession of Wheelers emerging from the forest--dozens and dozens of them--all clad in splendid, tight-fitting garments and all rolling swiftly toward her and uttering their wild, strange cries. "They're sure to catch us!" panted the girl, who was still carrying the heavy dinner-pail she had picked. "I can't run much farther, Billina." "Climb up this hill,--quick!" said the hen; and Dorothy found she was very near to the heap of loose and jagged rocks they had passed on their way to the forest. The yellow hen was even now fluttering among the rocks, and Dorothy followed as best she could, half climbing and half tumbling up the rough and rugged steep. She was none too soon, for the foremost Wheeler reached the hill a moment after her; but while the girl scrambled up the rocks the creature stopped short with howls of rage and disappointment. Dorothy now heard the yellow hen laughing, in her cackling, henny way. "Don't hurry, my dear," cried Billina. "They can't follow us among these rocks, so we're safe enough now." Dorothy stopped at once and sat down upon a broad boulder, for she was all out of breath.