Ku dhammee weedhan soo socota: Priestley sanadkiisi labaad ee waxbarashadiisa buu dhammaystay markuu Shackleton ka noqday khabiir ku takhasusay dhulka
Safarkii "Nimrod" (1907<unk>09) ee Antarctica. Halkaasna wuxuu si dhow ula shaqeeyay geologists-ka caanka ah (Sir) Edgeworth David iyo Douglas Mawson, sidoo kale xubno ka tirsan socdaalka. Priestley wuxuu ka soo ururiyay shaybaarro macdan iyo lichen ah gobolka oo ay ku jiraan jasiiradaha ku yaal Badda Ross, Waqooyiga wejiga Mount Erebus volcano, iyo buuraha u dhow Ferrar Glacier. Waxa uu ka mid ahaa kooxda hormariska ah ee dhigayay cunto iyo shidaal Shackleton isku daygiisii ku dhowaa guusha ee ahaa in uu noqdo qofkii ugu horeeyay ee gaadha koonfurta barafka sanadkii 1909. Safarkii November 1908 kii, sababtoo ah meel aan ku filnayn oo teendho ah, Priestley wuxuu qaatay seddex maalmood oo baraf ah isagoo banaanka ku seexanaya boorsadiisa hurdada. Markii uu barafku sii xoogaysanayay, ayuu si tartiib ah hoos ugu soo dhacay barafka, wuxuuna ku sigtay inuu ka dhaco. Markii uu ka soo laabtay safarkii, wuxuu afar bilood ku qaatay England ka hor inta uusan ku laaban Sydney, Australia, si uu ula shaqeeyo Edgeworth David warbixinta cilmiga dhulka, ugu dambeyntii la daabacay 1914.