The principal interest of this series is the extensive material on J.D. Bernal and Hodgkin's writings about him (MSS. Eng. c. 7945-7947) which usefully complements that previously catalogued in MSS. Eng. c. 5648, 5649/1-12, d. 2827. Several other items document or refer to publications not listed in the Bibliography in the Royal Society Memoir.