Copy letter from Herbert Rix, to C Davison, 38 Charlotte Road, Birmingham 'Dear Sir, In answer to yours of April 26, I do not think it would be fair to charge you with the extra copies. The case is of course a little exceptional. Harrisons ought not, by right, to have included Mr Darwin's paper in your separate copies. I am now instructing them to charge the 19/6 [£19 and 6 shillings] to the Society. I am, yours faithfully, Herbert Rix Asst Sec [Assistant Secretary, Royal Society]'. 16 May 1888