"Soliloquy of Prof. Daniel Vaughn--'Gravitation is the beginning, and gravitation is the end; all earthly bodies kneel to gravitation.'" 157, 158. "We came to a metal boat." 165, 166. "Facing the open window he turned the pupils of his eyes upward." 197, 198. "We finally reached a precipitous bluff." 205, 206. "The wall descended perpendicularly to seemingly infinite depths." 209, 210. Etidorhpa. 255, 256. "We passed through caverns filled with creeping reptiles." 297, 298. "Flowers and structures beautiful, insects gorgeous." 303, 304. "With fear and trembling I crept on my knees to his side." 307, 308. Diagram descriptive of journey from the Kentucky cavern to the "End of Earth," showing section of earth's crust. 332, 333. "Suspended in vacancy, he seemed to float." 347, 348. "I stood alone in my room holding the mysterious manuscript." 357, 358. Fac-simile of letter from I--Am--The--Man. 363. Manuscript dedication of Author's Edition. 364, 365. HALF-PAGE AND TEXT CUTS. "The Stern Face." Fac-simile, reduced from copper plate title page of the botanical work (1708), 917 pages, of Simonis Paulli, D., a Danish physician. Original plate 7 x 5-1/2 inches. iv. "The Pleasant Face." Fac-simile of the original copper plate frontispiece to the finely illustrated botanical work of Joannes Burmannus, M.D., descriptive of the plants collected by Carolus Plumierus. Antique. Original plate 9 x 13 inches. v. "Skeleton forms oppose my own." Photograph of John Uri Lloyd in the gloomy alcove of the antiquated library. vi. "Let me have your answer now." 12. "I espied upon the table a long white hair." 14. "Drew the knife twice across the front of the door-knob." 32. "I was taken from the vehicle, and transferred to a block-house." 52. "The dead man was thrown overboard." 54. "A mirror was thrust beneath my gaze." 58. "I am the man you seek." 70. "We approach daylight, I can see your face." 106. "Seated himself on a natural bench of stone." 108. "An endless variety of stony figures." 129. Cuts showing water and brine surfaces. 136.