Correspondence concerning the construction of a boiler house in the basement of the Faculty of Economics and Politics and the possible use of its heat by other buildings in the vicinity. Includes job no. 509, drawing no. 19 'alternative route of heating duct to avoid tree roots' by Casson Conder and Partners; and job no. 509, drawing no. 10 'key plan' by Casson Conder and Partners (Feb 1965).