The ice extended to the sides of the cave except in two places. Here there were holes in the ice, bridged by low rock arches. We passed through one of these and descended by a wooden staircase some eighty steps, afterwards returning up through the other arch by another staircase. At the bottom we stood in a magnificent gallery named the _Korridor_, formed by a solid wall of ice on one side and by a wall of limestone rock on the other. The ice wall is the lower portion of the ice floor; the rock wall is the continuation of the roof. For the entire distance the ice wall rises almost perpendicularly some fifteen meters in height, while the rock wall arches overhead. [Illustration: THE LOWER ROSITTEN ALP AND THE UNTERSBERG.] The bottom of the _Korridor_ was filled with blocks of fallen limestone, through which any water drains off, and on which there was a wooden walk, so that we circled round the ice with the greatest ease. At one place on the limestone wall hung a cluster of big icicles, which, from their shape really deserved the name they bear, of the _Orgel_. At another place a hole, some six or seven meters deep, was hewn, in the form of a small chamber, directly into the ice mass. This is the _Kapelle_, where we performed our devotions by leaving our visiting cards on the floor. Near the middle of the _Korridor_ the ice mass bulges out and extends to the limestone wall, breaking the whole _Korridor_ into two parts, the western portion about eighty meters, and the eastern about one hundred and twenty meters long. This necessitated cutting a tunnel about eight meters long in the ice to get through. The color of the _Korridor_ is a darkish gray and is much more sombre than that of the _Grosser Saal_. A remarkable feature of the ice wall is the fact that distinct bands of stratification are visible in the ice in many places. Why the _Korridor_ is not filled up with ice and why the ice is perpendicular for such a distance are questions I am unable to answer satisfactorily; but it is probable that the temperature of the rock walls is sufficiently high to prevent ice from forming in winter or to melt it in summer if it does form in winter. The air in Dóbsina seemed still, and scarcely felt damp. In one or two places in the _Grosser Saal_ there was a slight sloppiness, showing incipient signs of thaw. In the _Korridor_ it was freezing hard. THE KOLOWRATSHÖHLE.