Among the many young men of Cleveland who, from the start, had an eye on the oil-refining business and had begun to take an active part in its development as soon as it was demonstrated that there was a reasonable hope of its being permanent, was a young firm of produce commission merchants. Both members of this firm were keen business men, and one of them had remarkable commercial vision—a genius for seeing the possibilities in material things. This man’s name was Rockefeller—John D. Rockefeller. He was but twenty-three years old when he first went into the oil business, but he had already got his feet firmly on the business ladder, and had got them there by his own efforts. The habit of driving good bargains and of saving money had started him. He himself once told how he learned these lessons so useful in money-making, in one of his frequent Sunday-school talks to young men on success in business. The value of a good bargain he learned in buying cord-wood for his father: “I knew what a cord of good solid beech and maple wood was. My father told me to select only the solid wood and the straight wood and not to put any limbs in it or any punky wood. That was a good training for me. I did not need any father to tell me or anybody else how many feet it took to make a cord of wood.” And here is how he learned the value of investing money: “Among the early experiences that were helpful to me that I recollect with pleasure was one in working a few days for a neighbour in digging potatoes—a very enterprising, thrifty farmer, who could dig a great many potatoes. I was a boy of perhaps thirteen or fourteen years of age, and it kept me very busy from morning until night. It was a ten-hour day. And as I was saving these little sums I soon learned that I could get as much interest for fifty dollars loaned at seven per cent.—the legal rate in the state of New York at that time for a year—as I could earn by digging potatoes for 100 days. The impression was gaining ground with me that it was a good thing to let the money be my slave and not make myself a slave to money.” Here we have the foundation principles of a great financial career. [Illustration: JOHN D. ROCKEFELLER IN 1872 ]