'Thursday, August 17. -- The weather has been extremely kind to us of late; we haven't a single grumble against it. Th temperature hovers pretty constantly at about -35°, there is very little wind and the sky is clear and bright. In such weather one sees well for more than three hours before and after noon, the landscape unfolds itself, and the sky colours are always delicate and beautiful. At noon today there was bright sunlight on the tops of the Western Peaks and on the summit and steam of Erebus -- of late the vapour cloud of Erebus has been exceptionally heavy and fantastic in form.' L.Huxley (ed.), Scott's Last Expedition, London, 1914, I, p.382, and see Pontings almost identical telephoto photograph of 'The Summit of Mount Erebus' taken in August 1911, facing p.150.
'Thurs 17 Aug Calm and fine. Sun now striking Erebus smoke and summit. Painting all day parasites for Atch, S.P.T. pages and sketches of today's lights.' (H.G.R.King (ed.), Edward Wilson, Diary of the Terra Nova Expedition..., New York, 1972, p.163).