Copy letter from Herbert Rix, to Dr Alfred Carpenter, Heath Lodge, Croydon 'My dear Sir, I am instructed to return you the accompanying MS [manuscript] with the explanation that no paper can be brought before the Society unless it is "communicated" by a Fellow of the Royal Society - i.e. it must be endorsed by some F.R.S. as a guarantee of its suitability for reading before the Society. I am, Dear Sir, faithfully yours Herbert Rix Asst Sec RS [Assistant Secretary, Royal Society]'. 22 January 1892