2 Quotes by Norman Macrae

His powers of memory were awe-inspiring, but only about matters on which he had fearsomely concentrated his mind.

The most important use to which he had put his memory was that he had stuffed an unprecedented number of mathematical constants and equations into it. Most of us have very few mathematical constants in our mind, perhaps only the up-to-twelve-times multiplication table. Johnny had put in his mind layers and layers of algebraic verities. These were the explanation of his extraordinary powers of mental calculation.