Letter from the Assistant Secretary of the Royal Society to J B S Haldane Letter from the Assistant Secretary of the Royal Society to J B S Haldane enclosing a copy of Haldane's original comments on a paper by Dr Gordon and Mr Sang made in his role as referee, and a copy of a letter by L Hogben, supervisor of Gordon and Sang's research, explaining the reason for the submission of an unedited paper and informing that the paper had been greatly reduced in length. 19 May 1941