The Russian admiral, Lütke, who was employed in surveying the coast of Novaya Zemlya from 1821 to 1824, made all his attempts along the west coast, without being able, however, to round Cape Nassau. All these trials, made towards the north-east, fully show us the great difficulties which Barendsz had to encounter, and the gallant perseverance which enabled him to penetrate thus far into the frozen seas. A greater proof of this exists in the fact that in 1872 we find that the steamer Tegethof, under the skilful command of Lieutenant Weyprecht, not only failed in rounding Novaya Zemlya, but was entirely closed in by the mighty ice-floes, and driven powerlessly towards the north-east. However, the sea north of Novaya Zemlya was not always found obstructed by the ice. During a favourable season ships could penetrate far to the north-east without the slightest difficulty. This was often proved by the old Dutch whalers or walrus-hunters, who, sailing north of Novaya Zemlya, even passed into the Kara Sea. The journal of Gerrit de Veer sufficiently proves that the year 1596 was by no means a favourable season. The Dutch walrus-hunters, among others Theunis Ys, Cornelis Roule, and William de Vlamingh, [21] repeatedly frequented these seas north of Novaya Zemlya; but we find no mention made of their having discovered Barendsz’s winter quarters. Skipper William de Vlamingh seems to have passed nearest to it. Witsen, in his work, North and East Tartary, speaks of this skipper’s voyage thus:— [22] “I was informed by skipper William de Vlamingh of Oost Vlielend, that when he sailed in the year 1664 to catch whales, he succeeded in passing along the northern shore of Novaya Zemlya, and rounded the N.E. point of the island in order to try and be more prosperous in his fishery than he had been towards the west. Steering S. and S.W. he came near or about the house in which Heemskerck had wintered in the year 1596. From the house he sailed E.S.E. till in about 74° latitude, where he saw nothing but open water. He afterwards sailed back in the same direction, and 16 days after having lost sight of Novaya Zemlya he again anchored in the Vlie.” Combining all the information we find in the work of Witsen, there are reasons for believing that De Vlamingh went on shore on the west and on the north coasts of Novaya Zemlya, but not on the east coast. Mr. de Jonge, speaking about this whaling cruise, remarks:— “According to this account Vlamingh would have been near the house of Barendsz or thereabout, but Witsen does not say that Vlamingh went on shore there. This information leads us to conclude that Vlamingh did not see the wintering house at all, but simply presumed that he had been near to it or thereabout, or else surely he would not have failed to have mentioned it.”