I used, when I was little, to hear talk once in a while of some very wonderful person whom men called a "genius," and of what it was to be a genius. The word puzzled me a good deal, because I could not understand what was meant when it was explained to me. I used to ponder over it, and hope that some day I might see one, which would be quite as wonderful, I had no doubt, as seeing the man out of the moon. Then, when El Mahdi came into his horse estate and our lives began to run together, I would lie awake at night trying to study out what sort of horse it was that deliberately walked off the high banks along the road, or pitched me out into the deep blue-grass, or over into the sedge bushes, when it occurred to him that life was monotonous, tumbling me upside down like a girl, although I could stick in my brother's big saddle when the Black Abbot was having a bad day,--and everybody knew the Black Abbot was the worst horse in the Hills.
Wondering about it, the suggestion came that perhaps El Mahdi was a "genius." Then I pressed the elders for further data on the word, and studied the horse in the light of what they told me. He fitted snug to the formula. He neither feared God, nor regarded man, so far as I could tell. He knew how to do things without learning, and he had no conscience. The explanation had arrived. El Mahdi was a genius. After that we got on better; he yielded a sort of constructive obedience, and I lorded it over him, swaggering like a king's governor. But deep down in my youthful bosom, I knew that this obedience was only pretended, and that he obeyed merely because he was indifferent.
He stood by while I hammered the stirrup, with his iron grey head held high in the air, looking away over the hickory ridge across the blue hills, to the dim wavering face of the mountains. He was almost seventeen hands high, with deep shoulders, and flat legs trim at the pastern as a woman's ankle, and a coat dark grey, giving one the idea of good blue steel. He was entirely, I may say he was abominably, indifferent, except when it came into his broad head to wipe out my swaggering arrogance, or when he stood as now, staring at the far-off smoky wall of the Hills, as though he hoped to find there, some day farther on, a wonderful message awaiting him, or some friend whom he had lost when he swam Lethe, or some ancient enemy.