Copy letter from an unknown correspondent, to Messrs Harrison & Sons Herewith is a list of names and addresses to each of which should be sent a copy of the three Argon papers; Lord Rayleigh [John William Strutt], Professor [William] Ramsay, Mr Crookes, and Professor O[?]. The bill for wrapping, addressing and postage should go to Rayleigh. [Part of copy letter faded to illegibility]. 10 July 1895