Copy letter from Herbert Rix, to Professor William Newton Parker, 74 Llandaff Road, Cardiff 'Dear Prof Parker, The rule is that the executors of a deceased Fellow are intitled to receive all publications issued up to the date of death, but none beyond that. You appear to have already received all that were due at the time of your father's death. Phil. Trans. ['Philosophical Transactions of the Royal Society'] 1890 was not published till Feby [February] 1891. Yours truly Herbert Rix Asst Sec RS [Assistant Secretary, Royal Society]'. 30 July 1891