7 x 10 in. xxx, 348 pp., (xiii, 337 pp.) Original publisher's red/orange cloth boards. Color and B&W photographic plates and 3 folding maps at rear of vol. 2 all present. Errata slip tipped in at title pg of vol. 1. Condition is VERY GOOD+ ; an unusually nice set with only mild wear to the corners and spine ends, covers very clean and spines also clean with all titles bright and highly legible. The spine of vol. 2 has one tiny ink mark. Bindings both tight. Upper text edges are moderately foxed. Text is clean and bright with all color plates and their tissue guards present. Folding maps in pocket at rear of vol. 2 are all excellent, with no discolorations or splits. Exploration. RGR.