Antarctica: Wilkins-Hearst Expedition 1928-30: Envelope signed by both Hubert Wilkins and pilot Joe Crosson, bearing Falkland Is. 1d. tied by “Wilkins Antarctic/Expedition/Deception/Island” cachet in green and Port Stanley “29 OC/28” c.d.s., the cover later carried on the 1931 Wilkins-Ellsworth Trans-Arctic Submarine Expedition with expedition cachet, U.S. 2c. New York June 1 1931 duplex, G.B. 11/2d. cancelled Oct. 3 and New York Oct. 14 backstamp. Photo. (Image1)

Antarctica: Wilkins-Hearst Antarctic Expedition 1928-30: Airmail envelope signed by Hubert Wilkins, addressed to Minneapolis altered to Montevideo bearing Uruguay 1c. cancelled there on Oct. 31 1929, also showing Falkland Islands 1d. cancelled at Port Stanley Oct. 29, and with fine strikes (front and back) of South Shetlands “JA 6/30” c.d.s. Photo. (Image1)