Letter, from Augustus De Morgan to Sir John Herschel, dated at 91 Adelaide Road Autograph letter signed by sender. Did John Frederick William Herschel know when he was Master of the Mint that Isaac Newton had introduced a golden quarter-guinea? Most of his family are at Aldeburgh. Does he know Tristram Shandy's sense of proportion? Charles Babbage has become a public benefactor by the passing of the act against barrel organs. 18 August 1864