[To THE EDITOR OF THE " SPECTATOR."] - am writing in
Switzerland, where I am out of reach of all books of reference and of my own records. But surely my memory does not play me false when I say that Francis Galton dealt very fully with the matter of "memory and its shapes," and the like, in a book called, I believe, Mental Imagery that was published in the " eighties." I remember collecting some data for him when I was a young master at Cheltenham College, in the early " eighties "; and I remem- ber, I feel sure, seeing my own particular curve of number reproduced in his book. I gather that your correspondents are not aware that Francis Galton had investigated this matter.
Hotel Croix Federate, Champery, Switzerland.