But the barometric portent, as so often it is in high latitudes, was a mumbling lie. Consulting the wind record next morning, I found that the velocity had not risen over thirty-five miles per hour during the night. Wednesday the 4th was still windy, but the barometer rose again. That day I found the roof of the fuel tunnel caving under the accumulating weight of drift. The roofing canvas was bulging between the supporting planks, and two planks had already given way. Fearful that the whole tunnel might cave in and that, with my crippled arm, I should never be able to dig it out before the next blizzard, I shored it up as best I could with boxes and two-by-four timbers. The cold following the quieting of the gale would in time anneal the new, light snowflakes into a hard bridge over the tunnel; but to hasten the process I spent hours melting snow on the stove, carrying the water topside, and pouring it over the weak spots. The temperature was 6 degrees above zero, which should have seemed positively warm, compared to the -60 degrees weather I had become acclimatized to in March. The wind, however, cut to the bone; and my nose and cheeks were raw from frostbite. I went without hot food, preferring to use the stove continuously for melting snow; that night I slipped into the bunk an exhausted man.
April 5
This morning, when I awakened, I could tell by the sound that the wind had dropped, though drift was still sifting through the outlet ventilator and past the stovepipe. I dressed rapidly and hurried up the ladder to take the 8 a.m. «ob.» But, when I heaved with my good shoulder against the trapdoor, it refused to give. Half-asleep and stiff with cold, I continued to push as hard as I could. Still the panel would not budge. Remembering then the thick, double-action feature, I yanked out the restraining pegs and tried pulling down. This didn't work, either. Even when I kicked loose from the ladder and swung out, clinging to the handle with my left hand, the door did not stir. This was serious. I let go and dropped in a heap to the veranda floor, and the thought broke through my numbed senses: You're caught now. You're really caught, double-action and all.
With the flashlight, which I usually carried suspended from a cord looped around my neck, I located a long two-by-four under a jumble of gear in the veranda. Using my good arm to drive and the other to balance, I manipulated the timber as a vertical battering ram. Fifteen or twenty minutes of hard pounding served to crack the door a little; and, by bracing myself on the ladder and throwing the strength of my back against the panel, I finally succeeded in wedging an opening wide enough to wiggle through. Once on the surface, I quickly found the cause of the trouble. The day before, while I was working in the food tunnel, the shack door had been open a long time. The warm air had evidently softened the snow around the hatch; and, after the warmth was cut off, this melted margin had solidified into hard ice, which had wedged the door shut.
However, ice was not alone to blame. A full two and a half feet of drift lay packed over the trapdoor. This accumulation, I noticed, had built up behind the ventilator pipe and instrument shelter, which, in an easterly gale, stood to windward with respect to the trapdoor. Moreover, I observed further that the shack's not having been sunk quite enough was causing a thick shell of hard snow to come over the roof. Since the trapdoor was on the west side of the shack, it had naturally caught the brunt of the drift, which always fans out to leeward of any upraised object in the pattern of a ship's wake.
All that day, when not otherwise occupied with my observations, I hacked and dug and sawed at the offending mound, endeavoring to level off the surface round the shack. The day came off fine, but the spent wind still tossed up clouds of drift, and I did not want to go through another experience like yesterday's. The failure of my pet door had impressed me with the necessity of having an alternative hatch, against similar emergencies. Indeed, I had already planned such a one, had, in fact, worked on it intermittently during the blizzard.
My idea was to breach a hole in the west-pointing food tunnel and mine at right angles to it a new south-pointing passageway. The direction was selected after careful study. From experience with Antarctic weather I knew that the prevailing winds are easterly; the easterlies are the strong, snow-making, drift-making winds. Since I was powerless to prevent the drift from building up in the lee of the stovepipe and ventilator pipes, instrument shelter, and the shack itself, and therefore, over the food and fuel tunnels, the logical move was to drive a third tunnel out of the drift zone. Even this would not give complete security as a norther or a souther might come along presently and build up new drift ridges at right angles to those already cast up. Queerly, there is little actual increment from snowfall. Most of it blows away; yet, if the Empire State Building were standing in the Antarctic, it would eventually be smothered in drift.
I started the tunnel about midway down the food tunnel, directly opposite the recess in which the radio engine sat. It was to be from thirty to thirty-five feet long, about six feet high, and four feet wide. I proposed to carry it two or three feet below the surface, and, at the far end, to hole out a little shaft which would come within a foot of the surface. This thin shell could then be punctured whenever the other exit was blocked off. However, a foot a day, I decided, would be all I could do. «Even a foot means hard work,» my diary observes, «because I can use only my left arm. I saw the blocks out, then carry them to the hatch, where I hoist them to the surface, load them aboard a small man-hauling sledge, and haul them some distance to leeward.»
Unless you know something about the character of Antarctic snow, the reference to sawing it out in blocks may be puzzling. Except that it has been fused by cold, rather than heat, the Barrier snow is like a kind of sandstone. It is hard and brittle. You can't make snowballs with it. When you rub it, tiny icelike globules shred off. The color is the whitest white you ever saw; it has none of the smoothness and transparency of ice. After cold has coalesced the crystals of newly fallen snow, you can walk over it and not leave an impress. At times skis will slide helplessly as on slick glacier ice. You can't shovel that kind of snow. A shovel rings when it strikes as it might against rock. I used a two-foot hand saw. With this I cut out blocks, which could be pried clear with a shovel, leaving nice straight lines and debris easy to handle.
As a matter of fact, the escape tunnel was no wasted effort against a distant contingency. It became my water supply. All I had to do was to saw the blocks to a size suitable for the water bucket, and stack them in the veranda like cordwood. Yet, melting snow was an unmitigated nuisance; I loathed it. Two gallons of snow wielded barely two quarts of water after several hours on the stove. The water bucket was almost never off the stove; and, while it was there, little room was available for anything else. I came to hate its soot-blackened, dented sides; its greedy, ever-gaping maw; and once, when it careened to the floor and spilled all the water accumulated for supper, I cheerfully booted the bucket across the shack. Stooping to retrieve it, I caught my reflection in the shaving mirror. I was actually grinning.
April 6
I am sleeping fairly well, which is a blessing. But I still can't seem to wake up when I want to — missed by three quarters of an hour this morning — which is a nuisance. I don't know why I've lost the faculty; I'll have to regain it somehow. When the long night comes, I shall have no light to awaken me. I'm keeping the skylights cleared of snow to enjoy what little daylight remains. But all three are frosted over most of the time. When the temperature at the ceiling passes freezing, the frost melts; and the drip-drip-drip makes little ice stalagmites on the floor, which is always cold. I've proved, with a thermometer, that when I'm sitting down the temperature at the level of my feet is anywhere from 10 degrees to 30 degrees colder than at my head. .