Copy letter from Herbert Rix, to George Gabriel Stokes, Fellow of the Royal Society 'Dear Sir, The Treasurer wishes me to mention to you that it seems desirable to send invitations to 3 or 4 of the leading American Engineers who are now in England. He consulted with Dr Foster about it yesterday & we are sending (unless you disapprove) to Messrs D J Whithemore, H R Towne, A E Hunt, & Elibur [?] Thompson. Yours obediently H Rix'. 15 June 1889