Antarctica: ‘Operation Highjump’ 1946-47: USS “Pine Island”, two “Penalty for Private Use” envelopes sent officially from medical officers on board, stampless and with U.S. Navy 15763 BR. duplex, the first (Jan. 11, with “1946” year error) to Commander Western Sea Frontier in San Francisco on the day of discovery of the crash site of the aircraft “George I” in which the captain of the ship had been travelling, the second (Jan. 17) with Task Force 68 cachet sent to the Chief of the Bureau of Medicine and Surgery in Washington DC sent five days after the survivors had been recovered. Henry Howard Caldwell (1905-1985) was declared officially missing after the flying boat (in which he was an observer) crashed on the Thurston peninsula. Three of the crew were killed and Caldwell, with other survivors, was marooned for thirteen days before rescue. Photo. (Image1)