'From A. P. WATT LTD. 26/28 Bedford Row, London, WC1R 4HL to whom please address all communications about the work to which this slip is attached'. vi + 304 leaves of typescript with typescript and biro amendments. Some leaves have reworked typescript sections stapled to them. 304 is held together with sticky tape. Other leaves have tippex corrections and erasures. Bundles stapled together and arranged by chapter, c.1964.