Correspondence with Sir James Chadwick Correspondence re Chadwick's 80th birthday dinner, including his reminiscenses of Rutherford and 'his [Rutherford's] reluctance to develop nuclear physics in the 1930s. That was why I had to leave Cambridge.. My last meeting with him was in early June 1936 and ended in almost a quarrel about the future of the Cavendish. I was quite right and he must have known it. He forgave me but it is an abiding sorrow to me that we should have parted with such a divergence of views' 1971