Referee's report by Percy George Hamnall Boswell, on a paper 'Seismic investigations on the Palaeozoic floor of east England' by Edward Crisp Bullard, T F Gaskell, W B Harland and C Kerr-Grant Sectional Committee: Physics Recommended for publication in the 'Philosophical Transactions of the Royal Society'. The authors should enclose their proposed illustrations. Knows of an older record of a boring at Saffron Walden which may be of interest to the authors. [Published in the Philosophical Transactions of the Royal Society] Endorsed on verso as received 4 November 1939. [November 1939]