Referee's report by George Clarke Simpson, on a paper 'The electric fields of South African thunderstorms' by Basil Ferdinand Jamieson Schonland and J Craib Sectional Committee: Physics Recommended for publication in the 'Proceedings of the Royal Society of London'. [Published in the 'Proceedings of the Royal Society of London' A, 1927] Endorsed on verso as received 21 January 1927. [January 1927]