London: Hodder and Stoughton, 1912. First Edition, SIGNED BY THE AUTHOR on label. Octavo. pp. vii, 319. With 5 monochrome plates featuring illustrations of dinosaurs and landscapes. Also featuring the clipped signature of Sir Arthur Conan Doyle affixed to the front pastedown. In maroon morocco leather binding of W. Perkins Bull, K.C., a notable Canadian book collector. Gilt titles to spine and gilt flower medallion stamped to front board. Top edge gilt. Binding loose between frontispiece and title page. Spine has seen some wear, with a small tear and some slight flaking. Occasional foxing, mainly to prelims. Professor George Edward Challenger leads a return expedition to a plateau in the Amazon rain forest, where dinosaurs, Cave Men, and other prehistoric creatures are found to be co-existing, cut off from the rest of the world. Item #44095

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