Ninnis had a touch of snow-blindness which rapidly improved under treatment. The stock cure for this very irritating and painful affection is to place first of all tiny "tabloids" of zinc sulphate and cocaine hydrochloride under the eyelids where they quickly dissolve in the tears, alleviating the smarting, "gritty" sensation which is usually described by the sufferer. He then bandages the eyes and escapes, if he is lucky, into the darkness of his sleeping-bag.
In certain lights one is sure to be attacked more or less severely, and coloured glasses should be worn continually. Unfortunately, goggles are sometimes impracticable on account of the moisture from the breath covering the glasses with an icy film or driving snow clogging them and obscuring the view. For such contingencies narrow slots of various shapes are cut in plates or discs of wood or bone in the Esquimaux fashion. The amount of light reaching the eye can thus be reduced to the limit of moderately clear vision.
The morning of the 20th broke with wind and drift which persisted until after noon. Already everything had been packed up, but, as there was a steep fall in front and crevasses were not far distant, we decided not to start until the air was clear of snow.
When at last a move was possible, it became evident that the dogs could not be trusted to pull the sledges down to the edge of the glacier. So they were tethered to ice-axes while we lowered the sledges one by one, all three checking their speed, assisted by rope brakes round the runners. Finally, the impatient dogs were brought down and harnessed in their accustomed places.
Rapid travelling now commenced over a perfectly smooth surface, sloping gently to the bed of the glacier. Mertz shot ahead on skis, and our column of dogs and sledges followed quickly in his trail.
From this day forward our "order of procession" was as follows:—Behind the forerunner came a team of dogs dragging two sledges joined together by a short length of alpine rope. Bringing up the rear were the rest of the dogs dragging the third sledge. Each team pulled approximately equal weights; the front load being divided between two sledges. Except when taking my turn ahead, I looked after the leading team, Ninnis or Mertz, as the case might be, driving the one behind.
We skirted Aurora Peak on its south-eastern side. The mountain rose to a height of about seventeen hundred feet on our left, its steep sides being almost completely snow-clad.
The wide depression of the Mertz Glacier lay ahead, and on its far side the dim outline of uprising icy slopes was visible, though at the time we could not be certain as to their precise nature.
As the sledges passed Aurora Peak, Blizzard and Ginger Bitch ran alongside. The former had hurt one of her forefeet on the previous day during the "rough-and-tumble" descending into the valley. Ginger Bitch was allowed to go free because she was daily expected to give birth to pups. As she was such a good sledge-dog we could not have afforded to leave her behind at the Hut, and later events proved that the work seemed actually to benefit her, for she was at all times the best puller and the strongest of the pack. However, in permitting both dogs to run loose that afternoon, there was an element of danger which we had not sufficiently appreciated.
Suddenly, without any warning, half of my dogs dropped out of sight, swinging on their harness ropes in a crevasse. Next moment I realized that the sledges were in the centre of a bridge covering a crevasse, twenty-five feet wide, along the edge of which part of the team had broken through.