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Rh roared the torrent. We ventured on these planks, and in a few minutes reached the rock which supported Terrapin Tower. This round tower, forty-five feet in height, is built of stone, with a circular balcony at its summit, and a roof covered with red stucco. The winding staircase, on which thousands of names are cut, is wooden. Once at the top of the tower, there is nothing to do but cling to the balcony and look.

The tower is in the midst of the cataract. From its summit the eye plunges into the depths of the abyss, and peers into the very jaws of the ice monsters, as they swallow the torrent. One feels the rock tremble which supports it. It is impossible to hear anything but the roaring of the surging water. The spray rises to the top of the monument, and splendid rainbows are formed by the sun shining on the vapourized water.

By a simple optical illusion, the tower seems to move with a frightful rapidity, but, happily, in the opposite direction to the fall, for, with the contrary illusion, it would be impossible to look at the gulf from giddiness.

Breathless and shivering, we went for a moment inside the top landing of the tower, and it was then that the Doctor took the opportunity of saying to me,—

"This Terrapin Tower, my dear sir, will some day fall into the abyss, and perhaps sooner than is expected."

Ah! Indeed!"