| Description | A letter from John Clay (of Cambridge University Press) to Karl Pearson, dated 11 February 1911, enclosing a proof for approval and requesting a decision on plates and standing type. Also includes various original photographs, printed draft plates of photographs and illustrations; printed copies of plates Q, R, BB, CC, EE, GG and HH. Mock-ups of plates AA, BB, CC, DD, EE, FF, P, Q, S, T, U, V, W, Y and Z, with annotations in Karl Pearson's hand. |