Copy letter, from Sir John Herschel to Sir William Watson, dated at Slough Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. John Frederick William Herschel's father and mother will call on William Watson during visit to Bath, scheduled after wedding of John Frederick William Herschel's cousin. Spent three weeks meeting science luminaries in Paris. Notes continuity of scientific endeavors there over three generations. 15 February 1819