A JOURNEY TO THE EARTH'S INTERIOR OR HAVE THE POLES REALLY BEEN DISCOVERED ... Revised and Enlarged. Aurora, Illinois: Published by the Author, 1920. Octavo, pp. [1-6] 7-456, twelve inserted plates, original decorated red-brown cloth, front panel stamped in gold and blind, spine panel stamped in gold. The second edition, revised and considerably expanded from the earlier 1913 edition. A very detailed explanation and defense of the author's hollow earth theory. A chapter is devoted to an imaginary journey through the earth–into one polar opening and out through the other. Interesting illustrations, some in color. For an account of Gardner and his book see Martin Gardner, In The Name of Science (1952), pp. 21-2. Clareson, Science Fiction in America, 1870s-1930s 328. Mild bump to lower spine end, corners gently bruised. some mild rubbing to cloth, a bright, nearly fine copy. Scarce. (#136646).
"Revised and Enlarged" on title page.