The B.A.N.Z. Antarctic Expedition:Official original photograph by Captain Frank Hurley:Image A40 - title: 'Heading south on the lone Trail',with official 'Mawson Antarctic Expedition' handstamp and release date 'Monday Apr. 28, 1930' verso, together with the official letterhead, title, and details of the image, 'A wake formed by the passage of the Discovery...off Enderby land, Antarctica',34.5 x 12 cm.