Copy letter, from Sir John Herschel to Charles Babbage, 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. [Theophila] Gwatkin will accept Georgiana Babbage's invitation. Will set date after Gwatkin returns from Baylin. Asks Charles Babbage to be trustee in John Herschel's marriage settlement to Harriet Gwatkin. 2 July 1821