We are all adventurers here, I suppose, and wild doings in wild countries appeal to us as nothing else could do. It is good to know that there remain wild corners of this dreadfully civilised world.
We have had a bright fine day. This morning a balloon was sent up without thread and with the flag device to which I have alluded. It went slowly but steadily to the north and so over the Barne Glacier. It was difficult to follow with glasses frequently clouding with the breath, but we saw the instrument detached when the slow match burned out. I'm afraid there is no doubt it fell on the glacier and there is little hope of recovering it. We have now decided to use a thread again, but to send the bobbin up with the balloon, so that it unwinds from that end and there will be no friction where it touches the snow or rock.
This investigation of upper air conditions is proving a very difficult matter, but we are not beaten yet.
Wednesday, August 30.—Fine bright day. The thread of the balloon sent up to-day broke very short off through some fault in the cage holding the bobbin. By good luck the instrument was found in the North Bay, and held a record.
This is the fifth record showing a constant inversion of temperature for a few hundred feet and then a gradual fall, so that the temperature of the surface is not reached again for 2000 or 3000 feet. The establishment of this fact repays much of the trouble caused by the ascents.
Thursday, August 31.—Went round about the Domain and Ramp with Wilson. We are now pretty well decided as to certain matters that puzzled us at first. The Ramp is undoubtedly a moraine supported on the decaying end of the glacier. A great deal of the underlying ice is exposed, but we had doubts as to whether this ice was not the result of winter drifting and summer thawing. We have a little difference of opinion as to whether this morainic material has been brought down in surface layers or pushed up from the bottom ice layers, as in Alpine glaciers. There is no doubt that the glacier is retreating with comparative rapidity, and this leads us to account for the various ice slabs about the hut as remains of the glacier, but a puzzling fact confronts this proposition in the discovery of penguin feathers in the lower strata of ice in both ice caves. The shifting of levels in the morainic material would account for the drying up of some lakes and the terrace formations in others, whilst curious trenches in the ground are obviously due to cracks in the ice beneath. We are now quite convinced that the queer cones on the Ramp are merely the result of the weathering of big blocks of agglomerate. As weathering results they appear unique. We have not yet a satisfactory explanation of the broad roadway faults that traverse every small eminence in our immediate region. They must originate from the unequal weathering of lava flows, but it is difficult to imagine the process. The dip of the lavas on our Cape corresponds with that of the lavas of Inaccessible Island, and points to an eruptive centre to the south and not towards Erebus. Here is food for reflection for the geologists.
The wind blew quite hard from the N.N.W. on Wednesday night, fell calm in the day, and came from the S.E. with snow as we started to return from our walk; there was a full blizzard by the time we reached the hut.
CHAPTER XIV
Preparations: The Spring Journey
Friday, September 1.—A very windy night, dropping to gusts in morning, preceding beautifully calm, bright day. If September holds as good as August we shall not have cause of complaint. Meares and Demetri started for Hut Point just before noon. The dogs were in fine form. Demetri's team came over the hummocky tide crack at full gallop, depositing the driver on the snow. Luckily some of us were standing on the floe. I made a dash at the bow of the sledge as it dashed past and happily landed on top; Atkinson grasped at the same object, but fell, and was dragged merrily over the ice. The weight reduced the pace, and others soon came up and stopped the team. Demetri was very crestfallen. He is extremely active and it's the first time he's been unseated.