First edition. Illustrations by J. Allen St. John. 1 vols. 8vo. Original grey cloth titled in black, dust jacket Zeuschner 9. Item #320135
Burroughs’ classic adventure uniting a long American tradition of Hollow Earth stories with his trademark jungle adventure with the pseudo scientific flair of Doyle’s Professor Challenger and The Lost World. Written in 1913 and published in the April 1914 issues of All-Story Weekly.