Pericles Diamandi was born at Pylaros in the Ionian Islands in 1868. During his student period he was consistently first in mathematics. In 1884 he left school and began work in the grain business. It was at this time that he realised that he had exceptional powers of mental calculation. Having read by chance in a newspaper one day an account of a performance by Jaques Inaudi, he was seized with a desire to emulate him and gave performances himself of mental calculation in Greece and Rumania. Diamandi soon had himself presented to the Academic des Sciences, before whom he wished to demonstrate his aptitudes as a calculator. The Academic entrusted the examination of the young man to the same committee which had tested Inaudi. An investigation was made, and at its conclusion Professor Charcot published a study of Diamandi in the Revue Philosophiqiie. These showed that Diamandi had approximately the same capacities as Inaudi but that his memory was "visual" whereas that of Inaudi was, as we have seen, "auditory". Diamandi "saw" the figures in his head, in front of the frontal lobes, as if they had been written up on a screen. They seemed to remain fixed there until by an effort of will he caused them to be effaced. He is regarded as 23rd in the list of all-time Mental Calculators.