"Thus died Negro Tom, this untaught arithmetician, this untutored scholar. Had his opportunities of improvement been equal to those of thousands of his fellow-men, neither the Royal Society of London, the Academy of Science at Paris, nor even a Newton himself need have been ashamed to acknowledge him a brother in science."
This obituary was doubtless extracted from a Southern newspaper. A fact once found is easily found again. I have come across the name of this unlettered negro prodigy many times since, with the substance of the facts already stated. In a letter which Dr. Benj. Rush, of Philadelphia, addressed to a gentleman in Manchester, England, he says that, hearing of the astonishing powers of Negro Tom, he, in company with other gentlemen passing through Virginia, sent for him. A gentleman of the company asked Tom how many seconds a man of seventy years, some odd months, weeks, and days had lived. He told the exact number in a minute and a half. The gentleman took a pen, and having made the calculation by figures, told the negro that he must be mistaken, as the number was too great. "'Top, massa," said the negro "you hab left out de leap years." On including the leap years in the calculation, the number given by the negro was found to be correct.[4]
That Dr. Buchanan did not mention his name is explained by the fact that he died only six months before; and the audience, who had doubtless read the obituary notice just recited, or a similar one, knew who was meant. Besides, he was a native African, and had no name worth having. He was only Negro Tom. In Bishop Grégoire's work, however, he is ennobled by the by the name of Thomas Fuller, and in Mr. Needles' Memoir the name of Thomas Tuller.[5]
Why Dr. Buchanan should have omitted to mention the name of "the New Orleans physician" does not appear, unless it be that he was equally well known. His name, I have found recently, was James Derham. Dr. Rush, in the American Museum for January, 1789, gave an account of Dr. Derham, who was then a practitioner of medicine at New Orleans, and, at the time the notice was written, was visiting in Philadelphia. He was twenty-six years of age, married, member of the Episcopal Church, and having a professional income of three thousand dollars a year. He was born in Philadelphia a slave, and was taught to read and write, and occasionally to compound medicines for his master, who was a physician. On the death of his master he was sold to the surgeon of the Sixteenth British regiment, and at the close of the war was sold to Dr. Robert Dove, of New Orleans, who employed him as an assistant in his business. He manifested such capacity, and so won the confidence and friendship of his master, that he was liberated on easy terms after two or three years' service, and entered into practice for himself. "I have conversed with him," says Dr. Rush, "upon most of the acute and epidemic diseases of the country where he lives. I expected to have suggested some new medicines to him, but he suggested many more to me. He is very modest and engaging in his manners. He speaks French fluently, and has some knowledge of the Spanish."[6]