Correspondence for Hodgkin Obituary and Memoir 'Kathleen Lonsdale 1903-1971' by D.M.C. Hodgkin, Biographical Memoirs of Fellows of the Royal Society, vol 21 (1975), 447-484. Lonsdale correspondence lent to Hodgkin for the compilation of the Memoir. The letters (together with a little associated material) span the period 1927- 1968. The bulk of the material dates from between 1949 and 1951 and relates to the participation by Soviet scientists at scientific meetings and other occasions in the UK. Photocopies of correspondence relating to and written during the time of Lonsdale's imprisonment during the Second World War have been discarded; the originals are at A.47, A.48. 1975