North discusses various adventures with convoys, including cars flipping over and dragging them through rivers. He mentions his contempt for Bertie's position on the war.
Whitehead writes to the Comptroller to ask that his son be recognized for his work on a joint report they had prepared on locating enemy guns by means of sound.
Montague thanks Whitehead for sending him a copy of Principle of Relativity, expresses shock that the Special Theory of Relativity is true, laying out various doubts and difficulties he has with it. Also mentions T.P. Nunn in a PS.
McDougall writes to Whitehead to give his opinion of life at Harvard and in Cambridge, saying that all is positive, but that it is a very expensive place to live.
McDougall writes of arrangements for making use of his apartment upon the Whiteheads' arrival, and mentions a good nearby grocery store and a few restaurants.
Whitehead replies to Jeans, withdrawing his paper and saying he will publish it elsewhere, while complaining that the paper's two referees had misunderstood it and made several criticisms which were entirely wrong.