(Science Fiction & Horror) 2 Vols. Burroughs, Edgar Rice. [Tarzan titles - first editions]: Tarzan and the Jewels of Opar. Chicago: A. C. McClurg, 1918. First edition, first printing. Illustrated by J. Allen St. John. 12mo., original gilt-lettered and decorated green cloth; light edge wear, corners just bumped, spine ends very slightly frayed, a little cocked. With 8 plates. Advertisements at back. Endpapers a little dusty, scattered internal spotting and small dust smudging. Zeuschner 598. * Tarzan at the Earth's Core. New York: Metropolitan, (1930). First edition. Illustrated by J. Allen St. John. 12mo, original black-lettered green cloth; minor edge wear, original laminated dust jacket (minor edge wear). Frontispiece. Internally clean. Bright, attractive copy. Zeuschner 664 (illustrating the dust jacket design as in this copy - on page 177).