Letter, from William Rutter Dawes to Sir John Herschel, dated at Camden Lodge Autograph letter signed by sender. Gives comparisons between some of Wilhelm Struve's observations of double stars and his own. Would like to purchase John Frederick William Herschel's lens if he does not require it himself. Regrets the weather was so bad when John Frederick William Herschel's daughters visited him. 16 November 1846