Copy letter from Herbert Rix, to Professor William Chandler Roberts-Austen, Fellow of the Royal Society 'Dear Sir, Inclosed herewith I beg leave to hand you cheque for £4, the fee for the Bakerian Lecture for the present year, and I shall be obliged if you will sign and return the inclosed form of receipt. I am, yours truly, H Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 28 February 1896