Copy letter from Herbert Rix, to Colonel Herschel, Fellow of the Royal Society 'Dear Sir, I have at length succeeded in getting your Brown paper guard book, so it will be able to go by same dispatch as the box of slips - viz. by next Thursday's case to Smithsonian Institute. We have packed the whole in a box which we are sending down to Wesley & Son's this afternoon. I am faithfully yours Herbert Rix Asst Sec RS [Assistant Secretary, Royal Society]'. 2 April 1889