Letter from F A Lindemann, (later Lord Cherwell), Christ Church, Oxford, to WSC, commenting on letter from a Mr Pollock [which has not survived]. Stating that Pollock's ideas for "aerial sentries" were well intentioned, but that there were many practical difficulties. Also stating that he had ideas for locating aircraft without sound, which would be worth exploring, and that he hoped that Britain would not be compelled to rely on fighters picking up and destroying enemy bombers. Although Pollock's scheme had difficulties, Lindemann cordially endorsed his claim that investigation and research was urgently required, and that it was "criminal" to neglect it. Also commenting on press speculation that France "disgusted at their inability to secure anything definite from London were making a deal with Germany at Britain's expense. "It is madness to trust the theory that the French and the Germans will never agree". Stating that he would not be surprised if in the next few months Germany presented a demand for the return of her Colonies, which might be given diplomatic support by France.