Margaret V. Pearson, I am indebted for the heavy task of aiding in selecting and of afterwards transcribing the numerous letters and papers, which has very greatly lightened my own labours. I cannot conclude without a word of thanks for the care which my printers, the Cambridge University Press, have devoted to the preparation of this work and the endeavours they have always made to meet the very varied requirements of its illustration.
THE GALTON LABORATORY,
UNIVERSITY OF LONDON. March 22, 1930.
Yff Ony thyng Amysse be
blame connyng, and nat me
I desyr pe redar to be my frynd,
yff per be ony amysse, pat to amend.
(Mary Mavdleyn, Digby Mystery.)