His faculty for calculation seemed to increase, and as he became acquainted with arithmetical terms, his performances were still more remarkable. In June, 1811, he was asked the following question: If the distance between Concord and Boston be sixty-five miles, how many steps must I take in going this distance, supposing each step to be three feet? The answer, 114,400 steps, was given in ten seconds. He was asked how many days and hours had elapsed since the Christian era commenced. In twenty seconds he replied, 661,015 days, 15,864,360 hours.
Questions still more difficult were answered with similar promptitude. What sum multiplied by itself will produce 998,001? In less than four seconds he replied 999. How many hours in thirty-eight years, two months, and seven days? The answer, 334,488, was given in six seconds.
These extraordinary performances, witnessed by thousands of people, and among them persons of the highest standing, were soon reported in the papers, and attracted scarcely less attention in Europe than in this country. In England, particularly, great curiosity was expressed, and the plan of taking young Colburn thither was suggested. After some deliberation, this project was resolved upon; and in the spring of 1812, the father and son embarked at Boston for Liverpool, where they landed on the 11th of May. They proceeded to London, and taking rooms at Spring Gardens, commenced their exhibition.
Great numbers came to witness the performances of the boy, among whom Zerah, in his Life, enumerates the dukes of Gloucester and Cumberland, Lord Ashburton, Sir James Mackintosh, Sir Humphrey Davy, and the Princess Charlotte. The latter, attended by her tutor, the bishop of Salisbury, remained a full hour, and asked a number of questions. Among the rest was this: What is the square of 4001? The answer, 16,008,001, was immediately given. The duke of Cambridge asked the number of seconds in the time elapsed since the commencement of the Christian era, 1813 years, 7 months, 27 days. The answer was correctly given, 57,234,384,000.
An extraordinary interest was excited in London in respect to this remarkable youth, and schemes for giving him an education suited to his turn of mind were suggested. At a meeting of several distinguished gentlemen, to mature some plan of this sort, various questions were proposed to the child. He multiplied the number eight by itself, and each product by itself, till he had raised it to the sixteenth power, giving, as the almost inconceivable result, 281,474,976,710,656. He was asked the square root of 106,929, and before the number could be written down, he answered 327. He was then requested to name the cube root of 268,336,125, and with equal facility and promptness he replied, 645.
A likeness of the young prodigy, drawn by Hull and engraved by Meyer, was now published, and sold at a guinea each. Many were sold, and a considerable profit was realized. Another scheme was now started,—a memoir of the child,—and among the committee to superintend its publication, were Sir James Mackintosh, Sir Humphrey Davy and Basil Montague. Several hundred subscribers were obtained, but, though many paid in advance, for some reason or other the work was never published. Young Colburn and his father now made a tour to Ireland and Scotland. Among his visitors in Scotland, were Dugald Stewart, Professor Playfair, Doctor Brewster and Doctor Macknight. In March, 1814, they returned to London. By the advice of friends, they now proceeded to Paris, where they arrived in July, 1814.
Zerah was carefully examined before the French Institute. It is curious that on this occasion he was longer in giving his answers than ever before; probably owing to some embarrassment. His performances, however, excited here, as everywhere else, the greatest astonishment. La Place, the author of the Méchanique Celeste, was present. Guizot received the youth at his house, and expressed in his behalf the liveliest interest.
Such was the feeling excited, that a project was set on foot for giving Zerah an education at the Royal College of Henry IV. Nothing was wanting but the sanction of the king; but at the precise moment when measures were in progress to secure this object, Bonaparte came back from Elba, sweeping everything before him. The Bourbons fled, and the emperor was reinstated upon his throne. Application was now made to him in behalf of young Colburn; his assent was obtained, and on the 13th May, 1815, he entered the seminary, which was now restored to its original title, the Lyceum Napoleon.
Mr. Colburn had, in England, Scotland and Paris, obtained a large number of subscribers to the memoir. Having placed his son in the Lyceum, he went to London to attend to the publication of the work. Here he met with bitter disappointment. His agent, who had been authorized to collect the money, had received about one third of the whole subscriptions, and appropriated the money to his own use. As he was poor, the whole sum was irretrievably lost. At the same time, Mr. Colburn found that his former friends were greatly chagrined to find that the French government, more liberal than themselves, had made provision for his son. Under this influence, the project of the memoir was abandoned, and a new scheme was proposed, the object of which was to raise two hundred pounds a year for six years, to defray the expenses of the boy's education.
While Mr. Colburn was pursuing this scheme, Zerah was at the Lyceum at Paris, which now became the theatre of the most interesting events. The battle of Waterloo was fought, Napoleon fled, and the French army retreated toward the capital. To this point, the hostile armies were now directing their march, and the citizens of Paris were roused for its defence. Every effort was made to strengthen the walls and throw up entrenchments. The scholars at the Lyceum received permission to join in this work, and with enthusiastic ardor, heightened by their sympathy for Napoleon, they went to their tasks, crying, "Vive l'Empereur." Our little mathematician was among the number, and if he could have multiplied forts as easily as he managed figures, Paris would, doubtless, have been saved. But the fortune of war decided otherwise. Paris was overwhelmed, Napoleon dethroned, and Louis XVIII. restored.