Copy letter from Herbert Rix, to Professor John Perry, Fellow of the Royal Society 'Soirée Dear Sir, The schedule which we have received does not include the spinning tops exhibit. We understood you had consented to show them, and so a schedule was sent for some descriptive particulars. Will you be able to exhibit them? Lord Rayleigh thinks we should remind you, as they would be very suitable for the ladies' night. Yrs [Yours] faithfully, Herbert Rix Asst Sec RS [Assistant Secretary, Royal Society]'. 5 June 1891