Pre-1939 correspondence Correspondence from Simon's career at Berlin, Breslau and his move to Oxford in 1933. This section includes lengthy correpondence with Prof Max Born (which overlaps with correspondence in FS/5/2) and also with Heinz and Fritz London. Also included is material on Simon's demagnetization research at the Magnet Laboratory at Bellevue, Paris, 1935-1938. The original order of the papers in FS/5/1/3 and FS/5/1/4 have been mantained. 1922-1939