Jules Verne

“ Assuredly the Great Eyrie now took on to my eyes an aspect absolutely fantastic. Its heights seemed peopled by dragons and huge monsters. If chimeras, griffins, and all the creations of mythology had appeared to guard it, I should have been scarcely surprised.
With great difficulty and not without danger we continued our tour of this circumvallation, where it seemed that nature had worked as man does, with careful regularity. Nowhere was there any break in the fortification; nowhere a fault in the strata by which one might clamber up. Always this mighty wall, a hundred feet in height! ”

“ I asked, "since the last appearance of flames above the Great Eyrie?"
"Nothing, Mr. Strock. From Pleasant Garden we can see the entire crest of the mountain. Not a suspicious noise has come down to us. Not a spark has risen. If a legion of devils is in hiding there, they must have finished their infernal cookery, and soared away to some other haunt."
"Devils!" cried Mr. Smith. ”

“ The height of the Great Eyrie scarce exceeds five thousand feet. A modest altitude, often surpassed in this section of the Alleghanies. As we were already more than three thousand feet above sea level, the fatigue of the ascent could not be great. A few hours should suffice to bring us to the crest of the crater. Of course, difficulties might present themselves, precipices to scale, clefts and breaks in the ridge might necessitate painful and even dangerous detours. This was the unknown, the spur to our attempt. As I said, our guides knew no more than we upon this point. ”