Copy letter from Herbert Rix, to Professor William Crawford Williamson, Fellow of the Royal Society 'Dear Prof Williamson, I regret to say that we have only complete volumes of the Phil. Trans. ['Philosophical Transactions of the Royal Society'] containing your earlier memoirs. Last year was the first year in which we published the Memoirs in Phil. Trans in separate form. I am, Dear Sir, faithfully yours, H Rix Asst Sec [Herbert Rix, Assistant Secretary, Royal Society]'. 2 July 1888