Etidorhpa Or the End of Earth.
"[...]few minutes past ten, and the blows I had heard were the strokes of the hammer upon the gong in the clock. The sun was shining into the room, which was quite cold, for the fire had gone out. I arose, dressed myself quickly, and after thoroughly laving my face and hands in ice-cold water, felt considerably refreshed. Before going out to breakfast, while looking around the room for a few things which I wanted to take with me, I espied upon the table a long white hair. This was indeed a surprise, for I had about concluded that my adventure of the previous night was a species of waking nightmare, the result of overworked brain and weakened[...]".