Letter, from Sir John Herschel to Richard Sheepshanks, dated at Collingwood Autograph letter signed by sender, damaged. Gives information from W. R. Hamilton on the location of the asteroid Iris. Proposes the Royal Astronomical Society begin collecting observations of sunspots, the goal being a complete series of 'the sun's aspect for every day of every year.' Offers the observations of H. Griesbach for 1846 as a 'nest egg' as well as some of his own. Requests address of G. Schwinck, who prepared a star atlas. Reports on F. G. W. Struve's Neptune observations. 13 October 1847