For several months he worked earnestly, at night after his daily tasks were over, and in secret, thinking how richly the Government would reward him if he succeeded. At last he produced a die of unique design, which perforated a parchment deed with four hundred little holes. He hastened to the Stamp officials to show his work. They were greatly pleased, and asked him which he preferred for his reward, a sum of money, or the position of Superintendent of Stamps, with a salary of three or four thousand dollars a year. He delightedly chose the latter, as that would make him comfortable for life. There was another reason for his delight; for being engaged to be married, he would have no solicitude now about daily needs: life would flow on as smoothly as a river.

At once he visited the young lady, and told her of his great success. She listened eagerly, and then said, "Yes, I understand this; but surely, if all stamps had a date put upon them, they could not at a future time be used without detection." His spirits fell. He confessed afterward that, "while he felt pleased and proud of the clever and simple suggestion of the young lady, he saw also that all his more elaborate system, the result of months of toil, was shattered to pieces by it." What need for four hundred holes in a die, when a single date was more effective? He soon worked out a die with movable dates, and with frankness and honor presented it before the Government officials. They saw its preferableness: the new plan was adopted by Act of Parliament; the old stamps were called in and new ones issued; and then the young inventor was informed that his services as Superintendent of Stamps, at three thousand dollars a year, were not needed.

But surely the Government, which was to save a half million dollars a year, would repay him for his months of labor and thought! Associations, like individuals, are very apt to forget favors, when once the desired end is attained. The Premier had resigned; and, after various promises and excuses, a lawyer in the Stamp Office informed him that he made the new stamp of his own free will, and there was no money to be given him. "Sad and dispirited, and with a burning sense of injustice overpowering all other feelings," says young Bessemer, "I went my way from the Stamp Office, too proud to ask as a favor that which was indubitably my right."

Alas! that he must learn thus early the selfishness of the world! But he took courage; for, had he not made one real invention? and it must be in his power to make others. When he was twenty-five he produced a type-casting machine; but so opposed was it by the compositors, that it was finally abandoned. He also invented a machine for making figured Utrecht velvet; and some of his productions were used in the state apartments of Windsor Castle.

A little later his attention was accidentally called to bronze powder, he having bought a small portion to ornament his sister's album. The powder, made in Germany, cost only twenty-two cents a pound in the raw material, and sold for twenty-two dollars. Here was a wonderful profit. Why could he not discover the process of making it? He worked for eighteen months, trying all sorts of experiments, and failed. But failure to a great mind never really means failure; so, after six months, he tried again, and—succeeded. He knew little about patents, had been recently defrauded by the Government; and he determined that this discovery should be kept a secret. He made a small apparatus, and worked it himself, sending out a travelling-man with the product. That which cost him less than one dollar was sold for eighteen. A fortune seemed now really within his grasp.

A friend, assured of his success, put fifty thousand dollars into the business. Immediately Bessemer made plans of all the machinery required, sent various parts to as many different establishments, lest his secret be found out, and then put the pieces of his self-acting machines together. Five assistants were engaged at high wages, under pledge of secrecy. At first he made one thousand per cent profit; and now, in these later years, the profit is three hundred per cent. Three of the assistants have died; and Mr. Bessemer has turned over the business and the factory to the other two. The secret of making the bronze powder has never been told. Even Mr. Bessemer's oldest son had reached manhood before he ever entered the locked room where it was made.

For ten years the inventor now turned his attention to the construction of railway carriages, centrifugal pumps, etc. His busy brain could not rest. When frequent explosions in coal-mines occasioned discussion throughout the country, he made, at large expense, a working model for ventilating mines, and offered to explain it to a committee of the House of Commons. His offer was declined with thanks. A little investigation on the part of great statesmen would have been scarcely out of place.

At the great exhibition in London in 1851, he exhibited several machines,—one for grinding and polishing plate glass, and another for draining, in an hour, an acre of land covered with water a foot deep. The crowd looked at them, called the inventor "the ingenious Mr. Bessemer," and passed on. Two years later he made some improvements in war implements, and submitted his plans to the Woolwich Arsenal; but they were declined, without thanks even. Some other men might have become discouraged; but Mr. Bessemer knew that obstacles only strengthen and develop men.

The improved ordnance having been brought to the knowledge of Napoleon III., he encouraged the inventor, and furnished the money to carry forward the experiments. While the guns were being tested at Vincennes, an officer remarked, "If you cannot get stronger metal for your guns, such heavy projectiles will be of little use." And then Mr. Bessemer began to ask himself if he could not improve iron. But he had never studied metallurgy. This, however, did not deter him; for he immediately obtained the best books on the subject, and visited the iron-making districts. Then he bought an old factory at Baxter House, where Richard Baxter used to live, and began to experiment for himself. After a whole year of labor he succeeded in greatly improving cast-iron, making it almost as white as steel.

Could he not improve steel also? For eighteen months he built and pulled down one furnace after another, at great expense. At last "the idea struck him," he says, of making cast-iron malleable by forcing air into the metal when in a fluid state, cast-iron being a combination of iron and carbon. When oxygen is forced in, it unites with the carbon, and thus the iron is left nearly pure. The experiment was tried at the factory, in the midst of much trepidation, as the union of the compressed air and the melted iron produced an eruption like a volcano; but when the combustion was over, the result was steel.