Copy letter from Sir Henry Thomas Tizard, to Professor Pettersson, Oceanografiska Institution, Hogskola, Goteborg, Sweden Refers to information from Professor Proudman that Petterson is organising a Swedish oceanographical expedition to undertake further investigation of the nature of the sea bottom, and consequently the history of ocean basins. Tizard, Foreign Secretary of the Royal Society, follows up Proudman's assertion that Pettersson could possibly visit England in the near future, noting that the Society would welcome a visit from Pettersson to give a short account of his plans. 12 September 1945