Draft letter, from Sir John Herschel to [Josiah Forshall?], dated at 24 Berkeley Square Rough draft letter in Herschel's hand. Reports on the changes to be made to the British Museum heating system to improve heating and ventilation in the manuscripts department, substantially difference from the final version in HS/27/62. Draft written on invitation to the election of New Fellows to the Royal Society. 9 June 1847