Copy letter, from Sir John Herschel to Charles Piazzi Smyth, dated at [Collingwood] Copy of a letter. Responds to CS's [see CS's 1847-7-14] request for observations of Gamma Scorpii as a double star. John Frederick William Herschel comments on CS having omitted J. C. Adams from the list of Neptune discoverers. 1847-7-15 or later