DENHAM, Dixon & Hugh CLAPPERTON. Narrative of Travels and Discoveries in Northern and Central Africa. London: John Murray, 1826. 4° (270 x 215mm). Engraved frontispiece and 37 plates and plans, one hand-coloured, one folding engraved map at end, illustrations (some browning, spotting and offsetting, most markedly to the folding map). Contemporary green calf decorated in gilt and blind (a few stains, extremities lightly rubbed). Provenance: Newborough (armorial bookplate). FIRST EDITION. Lowndes II, 629: "The most interesting and important work yet published on the subject of African researches."