Jedidiah Buxton, an English calculator, born at Elmton, Derbyshire, in 1705, died about 1775. He could not write, but possessed great facility in performing mental arithmetical calculations. He seemed unable to consider anything save with respect to the number of its constituent parts. After hearing a sermon, he remembered nothing of it except the exact number of words it contained; and if the size of an object were named, he would instantly declare how many hairs' breadths it contained. He scarcely had a system of calculation, as, from his own obscure explanation, his process was clumsy and circuitous, though extremely swift. He walked to London to see the king, and was examined by the royal society, who asked him: "In a body whose three sides are respectively 23,145,789 yards, 5,642,732 yards, and 54,965 yards, how many cubical eighths of an inch are there? " His reply, calculated at once without one figure having been written down, was found to be correct. Except with respect to this mastery of numbers, his intellect was much inferior to that of ordinary men.