In the spring of 1819, a little girl, about eleven years old, appeared at the Royal Exchange, and made some very extraordinary calculations. Several gentlemen asked her some intricate question, and while they were calculating it, she gave a correct answer. She was asked to multiply 525,600 by 250; which she answered in one minute, 131,400,000. A second question was, how many minutes there are in forty-two years? Answer, 22,075,200. She was next desired to multiply 525,000 by 450; answer, 236,250,000. Several other questions, equally difficult, were put, all of which she answered very correctly. It is remarkable, that the girl could neither read nor write. She stated herself to be the daughter of a weaver, living at Mile-End, New Town, of the name of Heywood.
— Cabinet of Curiosities, Natural, Artificial, and Historical, 1822