Copy letter from Herbert Rix, to Arthur Keen, 41 Bedford Row, W.C. 'I send herewith a testimonial from our Treasurer [John Evans], which will be of more use than any that I could send. He gave it very readily. Yours truly Herbert Rix Asst Sec RS [Assistant Secretary, Royal Society] P.S. Mr Wood of his COmmittee had better come & see the library for themselves'. 3 March 1892