Letter from Hans Petterson, to Sir Henry Thomas Tizard [Royal Society] Thanks for a letter received in Goteborg on the 4 October before Petterson's departure to the meeting of the International Council in Copenhagen. After consultation with Admiral Edgell to ensure that he will be in London, Petterson proposes the 7 February as the date on which to deliver his paper. Petterson will inform Tizard of the date of his intended arrival once his passage has been booked, and sends thanks for the invitation. 17 October 1945