Copy letter from Robert William Frederick Harrison, to Professor Michael Foster, Secretary, Royal Society At Professor Rucker's request, Harrison sends a letter from Dr Mond and proof of a letter to delegates [no attachments], which should be returned. Having to print some more copies of the circular inviting authors to make Index Slips, Harrison proposes revising it as shown on the enclosed copy [not attached], and to substitute for the specimen index given on the old circular two; one physical and the other biological. For this purpose he has selected Rutherford's as a physical specimen, with Professor [Arthut William] Rucker's approval, and for the other Risien Russell's, enclosed [not attached]. Asks for Foster's approval of the amendments. 7 July 1897