“That's what's the matter with Hannah's cat!” cheerfully chipped in the irrepressible Waldo. “I say, uncle Phaeton, is it just a lie-low here until yonder fellows grow tired of looking for what they can't find, then a flight on our part; or will we--” “Have we voyaged so far and seen so much, to rest content with so very little?” exclaimed the professor, hardly as precise of speech as under ordinary conditions. “No, no, my lads! Yonder lies the greatest discovery of the nineteenth century, and we are--Get a hustle on, boys! The day is waning, and with so much to see, to study, to--Come, I say!” In spite of his initial attempt to impress his nephews with a due sense of the heavy responsibilities which rested upon them, Phaeton Featherwit was far more excited than either one of the brothers. Doubtless he more nearly appreciated the importance of this wondrous discovery, provided his now firm belief was correct,--that yonder stood a solid, substantial city, erected by the hands of a people whom common consent had agreed were long since wiped out of existence. The story told by Cooper Edgecombe, backed up by the articles taken from the person of the warrior whom he had slain in self-defence, certainly had its weight; while the brief and imperfect glimpse which he had won of yonder valley helped to bear out that astounding belief. And yet, how could it be true? Really believing, yet forced by more sober reason to doubt, the poor professor was literally “in a sweat” long ere another view could be won of the depressed valley, although the landing of the air-ship was so well chosen as to make that trip of the briefest duration consistent with prudence. The natural obstacles were considerable, however, and as they picked their way along, the brothers for the first time began to gain a fairly accurate idea of what was meant by the term, a virgin forest. To all seeming, the human foot had never ventured here, nor were any marks or spoor of wild beasts perceptible on either side. Although the aerostat had landed not far below the crest of those hills, the adventurers had to climb higher, before winning the coveted view, partly because the most practicable route led down into and along a winding gulch, where the footing was far less treacherous than upon the higher ground, cumbered, as that was, with the leaf-mould of centuries. Still, half an hour's steady labour brought the little squad to the coveted point, and once again Professor Featherwit was almost literally stricken speechless,--for there, far below their present location, spread out in level expanse, lay the secret valley with all its marvels. Far more extensive than it had appeared by that initial glimpse, the valley itself seemed composed of fertile soil, yet, by aid of the river which cut through, near its centre, irrigating ditches conveyed water to every acre, thus ensuring bounteous crops of grain and of fruit as well.