Copy letter from Herbert Rix, to James Forrest, Institution of Civil Engineers 'My dear Sir, I enclose the paper of instruction for intending candidates. You will see by it that the form of certificate can be given only to a Fellow of the Royal Society, and that the candidate is expected to take no part in his own candidature. I am, yours faithfully, Herbert Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 18 April 1891