Reread lines 67-100. What vivid words in the narrator's description of the tower climb create suspense? All at once, after an infinity of awesome, sightless crawling up that concave and desperate precipice, I felt my head touch a solid thing, and I knew I must have gained the roof, or at least some kind of floor. In the darkness I raised my free hand and tested the barrier, finding it stone and immovable. Then came a deadly circuit of the tower, clinging to whatever holds the slimy wall could give; till finally my testing hand found the barrier yielding, and I turned upward again, pushing the slab or door with my head as I used both hands in my fearful ascent. There was no light revealed above, and as my hands went higher I knew that my climb was for the nonce ended; since the slab was the trap-door of an aperture leading to a level surface of greater circumference than the lower tower, no doubt the floor of some lofty and capacious observation chamber. I crawled through carefully, and tried to prevent the heavy slab from falling back into place, but failed in the latter attempt. As I lay exhausted on the stone floor I heard the eerie echoes of its fall, but hoped when necessary to pry it up again.
Believing I was now at a prodigious height, far above the accursed branches of the wood, I dragged myself up from the floor and fumbled about for windows, that I might look for the first time upon the sky, and the moon and stars of which I had read. But on every hand I was disappointed; since all that I found were vast shelves of marble, bearing odious oblong boxes of disturbing size. More and more I reflected, and wondered what hoary secrets might abide in this high apartment so many aeons cut off from the castle below. Then unexpectedly my hands came upon a doorway, where hung a portal of stone, rough with strange chiselling. Trying it, I found it locked; but with a supreme burst of strength I overcame all obstacles and dragged it open inward. As I did so there came to me the purest ecstasy I have ever known; for shining tranquilly through an ornate grating of iron, and down a short stone passageway of steps that ascended from the newly found doorway, was the radiant full moon, which I had never before seen save in dreams and in vague visions I dared not call memories.