twenty games played simultaneously, and has been able
afterwards to reconstruct all the twenty games without any apparent
effort of memory. Most people, including myself, play chess (when they
play it at all) from hand to mouth, and can hardly recall the last move
but one, or foresee the next but two. Also, when I have to make an
arithmetical calculation, I have to do it step by step with pencil and
paper, slowly, reluctantly, and with so little confidence in the result
that I dare not act on it without 'proving' the sum by a further
calculation involving more ciphering. But there are men who can neither
read, write, nor cipher, to whom the answer to such sums as I can do
is instantly obvious without any conscious calculation at all; and the
result is infallible. Yet some of these natural arithmeticians have but
a small vocabulary; are at a loss when they have to find words for any
but the simplest everyday occasions; and cannot for the life of them
describe mechanical operations which they perform daily in the course of
their trade; whereas to me the whole vocabulary of English literature,
from Shakespear to the latest edition of the Encyclopaedia Britannica,
is so completely and instantaneously at my call that I have never had
to consult even a thesaurus except once or twice when for some reason I
wanted a third or fourth synonym. Again, though I have tried and failed
to draw recognizable portraits of persons I have seen every day for
years, Mr Bernard Partridge, having seen a man once, will, without more
strain than is involved in eating a sandwich, draw him to the life. The
keyboard of a piano is a device I have never been able to master; yet Mr
Cyril Scott uses it exactly as I use my own fingers; and to Sir Edward
Elgar an orchestral score is as instantaneously intelligible at sight as
a page of Shakespear is to me. One man cannot, after trying for years,
finger the flute fluently. Another will take up a flute with a newly
invented arrangement of keys on it, and play it at once with hardly a
mistake. We find people to whom writing is so difficult that they prefer
to sign their name with a mark, and beside them men who master systems
of shorthand and improvise new systems of their own as easily as they
learnt the alphabet. These contrasts are to be seen on all hands, and
have nothing to do with variations in general intelligence, nor even
in the specialized intelligence proper to the faculty in question: for
example,