Letter, from Sir Charles Lyell to Sir John Herschel, dated at 16 Hart St. Autograph letter signed by sender. Hears that John Frederick William Herschel expressed to William Whewell great pleasure in parts of C. Lyell's book. Has been altered and improved since the 1st edition. When in Copenhagen last year [H. C.] Oersted was reading John Frederick William Herschel's paper on double stars. Murray has sold 1750 copies of C. Lyell's book. 6 July 1835