BURROUGHS, EDGAR RICE. Tarzan and the Jewels of Opar. Chicago: McClurg, 1918. 8vo, original dark green cloth (spine a bit dull and with small nick at top); color pictorial dust jacket reproducing a painting by J. Allen St. John (minor wear at edges); dark brown half morocco folding case. FIRST EDITION. 8 inserted plates with illustrations by St. John (the first Burroughs book in which his artwork appears in halftones), with publisher's color postcard for this title laid in. Heins JO-1. Rare in dust jacket.