And here I was, or seemed to be, particularly unlucky; for as I drew near the very entrance, lightly of foot, and warily, the moon (which had often been my friend) like an enemy broke upon me, topping the eastward ridge of rock, and filling all the open spaces with the play of wavering light. I shrank back into the shadowy quarter on the right side of the road, and gloomily employed myself to watch the triple entrance, on which the moonlight fell askew.
All across and before the three rude and beetling archways hung a felled oak overhead, black and thick and threatening. This, as I heard before, could be let fall in a moment, so as to crush a score of men, and bar the approach of horses. Behind this tree the rocky mouth was spanned, as by a gallery, with brushwood and piled timber, all upon a ledge or stone, where thirty men might lurk unseen, and fire at any invader. From that rampart it would be impossible to dislodge them, because the rock fell sheer below them twenty feet, or it may be more; while overhead it towered three hundred, and so jutted over that nothing could be cast upon them, even if a man could climb the height. And the access to this portcullis place--if I may so call it, being no portcullis there--was through certain rocky chambers known to the tenants only.
But the cleverest of their devices, and the most puzzling to an enemy, was that, instead of one mouth only, there were three to choose from, with nothing to betoken which was the proper access, all being pretty much alike, and all unfenced and yawning. And the common rumor was that in times of any danger, when any force was known to be on muster in their neighborhood, they changed their entrance every day, and diverted the other two, by means of sliding-doors, to the chasm and dark abysses.
Now I could see those three rough arches, jagged, black, and terrible, and I knew that only one of them could lead me to the valley; neither gave the river now any further guidance, but dived underground with a sullen roar, where it met the cross-bar of the mountain. Having no means at all of judging which was the right way of the three, and knowing that the other two would lead to almost certain death, in the ruggedness and darkness--for how could a man, among precipices and bottomless depths of water, without a ray of light, have any chance to save his life?--I do declare that I was half inclined to go away, and have done with it.