There has been a lot of talk about the possibility of using aniline for marking the snow, and I should like to express an opinion on the question. We had discussed the possibility of being short of petrol during the return flight to Spitzbergen, and that we might have to land and take all the petrol into one machine and continue the journey with that one only. If the abandoned machine did not lie too far to the north, we would return later to fetch it. In order to make it easier to find it our intention was at certain distances from the machine to make a number of marks by throwing out quantities of aniline at certain spaces apart to mark the course of our continued flight to Spitzbergen. Last winter we made a number of experiments by throwing out large quantities of the powder at intervals from a flying machine, but got no satisfactory results. During our stay in Spitzbergen we experimented with marking the snow by scattering powder out by hand. The result of this test was that if the snow was damp or quite wet the effect was successful. If, on the contrary, there was frost and the snow was dry no sign remained to aid us. The aniline powder requires damp, therefore, before it can fulfill the purpose of marking a track. As we might expect to find these conditions further south in the Arctic Sea, and as we thought of the possibility of making such marks during the return journey, we took with us a small quantity of aniline. In connection with this we are indebted to the Badische Soda & Anilinfabrik for the interest which they and their firm’s representative, Erik Berrum (who gave us the idea), took in the experiment. Our ice-anchors were made by the factory in Marina di Pisa according to Amundsen’s designs. We had at that time, however, no idea that these would be considered later to be our best tool for hacking the hard ice. As ice-anchors they were also particularly effective. It happened that during the worst of the drifting we had to fasten the flying-boat to hold it safe from the encroaching ice. When the ice edges were almost setting together it was not so difficult to hold the nose direct against the pressure. The trend, however, changed in the shortest space of time so that the one ice-border “set” in an angle directly frozen into the other, both pressing together sideways and overlapping like the teeth of a ruminating cow. This was where we found it difficult to raise the boat.