The storm now increased in violence, and we were soon so surrounded by whirling clouds of snow that it was impossible to distinguish from what quarter the wind was blowing. The compass had for a long time been almost useless, in all probability owing to the magnetic ore contained in the rocks which underlie the snows of the Jökull. This rendered us entirely dependent upon the wind and the sun for our direction. In clear weather, where the compass is useless, I always steer by a circular piece of card marked off into four right angles, so that by carefully taking the angular bearings of all distinguishable objects, one is able to steer a pretty straight course.
_London, Longmans & C^o._ _E. Weller, Litho._
Map of the AUTHORS ROUTES _from_ Núpstað to Reikjahlíð]
Being now unable to avail myself of either compass, sun, wind, or card, nothing remained for us but another halt. For two days the storm continued and it would have been impossible to get many yards away from the tent without being lost. On the third day at noon the storm abated, the wind shifted due east, and the sun broke through the clouds. We all turned out, but it was useless to think of struggling through the loose, deep snow. We took our bed out to dry it, for it was wet with the exhalations from our bodies. This, however, was rather against the wish of some of my men, upon whom the inactivity of the last few days had begun to tell. I observed two black peaks protruding through the snow, one about five miles due north, and the other about eleven miles N.W. I was surprised to find a considerable quantity of volcanic ash upon the snow, of a fine, light, grey description. This appeared the more remarkable, as I knew of no volcano that had been in eruption south of the Vatna Jökull, and the storm had blown almost entirely from the S.E. Moreover, I was aware there was no ash of that kind anywhere upon the south. It appeared to me that this must have been carried either from an erupting volcano, or from some ash-strewn district to the north of the Jökull, by a current of air travelling in a different direction to the S.S.E. wind which we had experienced during the last few days, and bisecting the latter current at a point south of our present position, had been unable to resist its force, and had been carried by it to the place where it was now lying.