The man could not but note the very evident horror with which she mentioned the creatures. To him they were uncanny; but she had been used to them for a year almost, and probably all her life she had either seen or heard of them constantly. "Why do you fear them so?" he asked. "It seems more than any ordinary fear of the harm they can do you." She tried to explain; but the nearest he could gather was that she looked upon the Wieroo almost as supernatural beings. "There is a legend current among my people that once the Wieroo were unlike us only in that they possessed rudimentary wings. They lived in villages in the Galu country, and while the two peoples often warred, they held no hatred for one another. In those days each race came up from the beginning and there was great rivalry as to which was the higher in the scale of evolution. The Wieroo developed the first cos-ata-lu but they were always male--never could they reproduce woman. Slowly they commenced to develop certain attributes of the mind which, they considered, placed them upon a still higher level and which gave them many advantages over us, seeing which they thought only of mental development--their minds became like stars and the rivers, moving always in the same manner, never varying. They called this tas-ad, which means doing everything the right way, or, in other words, the Wieroo way. If foe or friend, right or wrong, stood in the way of tas-ad, then it must be crushed. "Soon the Galus and the lesser races of men came to hate and fear them. It was then that the Wieroos decided to carry tas-ad into every part of the world. They were very warlike and very numerous, although they had long since adopted the policy of slaying all those among them whose wings did not show advanced development. "It took ages for all this to happen--very slowly came the different changes; but at last the Wieroos had wings they could use. But by reason of always making war upon their neighbors they were hated by every creature of Caspak, for no one wanted their tas-ad, and so they used their wings to fly to this island when the other races turned against them and threatened to kill them all. So cruel had they become and so bloodthirsty that they no longer had hearts that beat with love or sympathy; but their very cruelty and wickedness kept them from conquering the other races, since they were also cruel and wicked to one another, so that no Wieroo trusted another. "Always were they slaying those above them that they might rise in power and possessions, until at last came the more powerful than the others with a tas-ad all his own. He gathered about him a few of the most terrible Wieroos, and among them they made laws which took from all but these few Wieroos every weapon they possessed.