As soon as the measurements had been made and Mawson had taken some photographs, the party returned to camp, because it had been decided to start the descent during the same afternoon.
Numerous specimens of the unique felspar crystals and of the pumice and sulphur were collected on the way back to camp, and, having arrived there, the travellers made a hasty meal, packed up, and started down the steep mountain slope, Brocklehurst insisting on bearing his own heavy load in spite of his frost-bitten feet.
Soon a point was reached where the party had either to retrace their way or to cut steps across a névé slope, or, lastly, to glissade down some 500 or 600 feet to a rocky ledge below. In their tired state, they chose the path of least resistance, which was offered by the glissade, and consequently the loads were rearranged so that they might roll down easily. Brocklehurst's load, which contained the cooking utensils, protested noisily as it went down, and the aluminium cookers received a severe battering from their abrupt contact with the rocks below.
At this time the whole party were suffering from thirst, but a makeshift drink was obtained by gathering a little snow, squeezing it into a ball, and placing it on the surface of a piece of rock, where it melted almost at once on account of the heat of the sun.
Adams and Marshall were the first to reach the depot, having dropped down 5000 ft. between 3 P.M. and 7 P.M., and they found that the blizzard of the 8th had played havoc with their gear, for the sledge had been overturned and some of the load scattered to a distance and partly covered with drift snow. The party camped during that night at the depot, and by 5.30 A.M. on the following morning the sledge was packed and the homeward journey resumed.
The sastrugi, however, were so troublesome that rope brakes were put on the sledge-runners, and two men went in front to pull when necessary, while two steadied the sledge, and two stayed behind to pull back when required.
At this time, indeed, the conditions were most trying, for the sledge either refused to budge or suddenly it took charge, and overran those who were dragging it.
Capsizes occurred every few minutes, and, owing to the slippery ground, some of the party who had not crampons or barred ski-boots were badly shaken up. One has to experience such a surface to realise how severe a jar one gets from falling. The only civilised experience akin to it is when one steps unknowingly on a slide which some small street-boy has made on the pavement.
The party reached the spot where they had made their first camp, six miles distant from Cape Royds, at 7.30 A.M. By this time a blizzard seemed to be approaching, and the snow, which was beginning to drift before a gusty south-easterly wind, threatened to cut off all view of the winter quarters. Every one was tired, one of the tents had a large hole burnt in it, the oil supply was almost done, and one of the stoves had been put out of action as the result of the glissade. So in the circumstances the party decided to make a dash for Cape Royds, leaving sledge and equipment to be picked up later.
In the grey light the sastrugi did not show up in relief, and every few feet some member of the party fell sprawling over the snow. At last their eyes were gladdened by the shining surface of the Blue Lake only half a mile distant from winter quarters. But now that the stress and the strain were over, their legs grew heavy and leaden, and that last half-mile seemed to be one of the hardest they had covered.