Copy of incomplete letter, from Sir John Herschel to Charles Babbage, dated at St. John's College, Cambridge Copy of incomplete letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Gratitude for Charles Babbage's friendship. Chemical supplies and instruments. Describes synthesis of 'Sulphurane' [S2Cl2] and other experiments. Theories of combustion and acids. [Letter continued on 1813-9-21:] John Frederick William Herschel avidly studying law, against father's wishes. 20 September 1814