Correspondence between Balfour Stewart and [John Peter] Gassiot Includes Mr Balfour Stewart's formal ‘resignation of the office of Superintendent of the Kew Observatory’ sent to [John Peter] Gassiot, dated 8th October 1869. Includes a letter from Stewart to Gassiot dated 13th October 1869. Stewart details arrangements which if carried out he wishes to withdraw his letters of resignation to Gassiot and Edward Sabine. Includes a letter from Gassiot to Stewart dated 14th October 1869. Remarks Stewart was ‘determined’ to send his resignation, Sabine has written to Colonel Smythe in Bombay [Mumbai], and nothing can be done until his reply arrives. Includes Mr Stewart's reply dated 15th October 1869, refers to his previous points regarding the scales and tables, self-winding electrometer and air thermometer. Includes a letter from Stewart to Gassiot dated 19th October 1869. Stewart remarks ‘It may facilitate matters to inform you that I learn Mr [Charles] Chambers is daily expected in this country’. [1869]