The lady had disappeared, and he felt sure that she had gone through that entrance.
He knew the house well, for it is distinguished from all others in Prague, both by its shape and its oddly ornamented, unnaturally narrow front.

It is built in the figure of an irregular triangle, the blunt apex of one angle facing the little square, the sides being erected on the one hand along the Karlsgasse and on the other upon a narrow alley which leads away towards the Jews' quarter.

Overhanging passages are built out over this dim lane, as though to facilitate the interior communications of the dwelling, and in the shadow beneath them there is a small door studded with iron nails which is invariably shut.

The main entrance takes in all the scant breadth of the truncated angle which looks towards the monastery.

Immediately over it is a great window, above that another, and, highest of all, under the pointed gable, a round and unglazed aperture, within which there is inky darkness.