Copy letter from Herbert Rix, to Mr Collings, 172 Strand 'Herewith the drawings to illustrate Prof. [Professor Thomas George] Bonney's paper; also a letter from himself with instructions about the position of the disks. The disks should not be reduced more than is necessary to bring them into one page of the "Proceedings [of the Royal Society]". They may be put in hand. HR'. 3 July 1894