Copy letter from Herbert Rix, to Messrs Eyre & Spottiswoode (Binding Department) 'Dear Sir, We sent you the other day cheque for £52-18-3 in payment of enclosed accounts. But you have omitted to receipt the acct [account] for £15-2-6 (July 6). Kindly put this right & return to me without delay, as our audit is in progress. Yours truly Herbert Rix Asst Sec RS [Assistant Secretary, Royal Society]'. 14 November 1891