2 volumes (including Supplementary Appendix), 8vo. With 34 engraved plates & 4 maps (one folding, one large folding route map in rear cover pocket). Original publisher's green cloth gilt (covers slightly faded or spotted). Provenance: David Mac Brayne (armorial bookplate). FIRST EDITIONS. Whymper made first ascents of Chimborazo and Cotopaxi (among others) and intended to "observe the effects of low pressure, and to attain the greatest possible height in order to experience it." The Supplement includes descriptions of the Coleoptera and Lepidoptera by H. W. BATES and others, and the Geology by T. G. BONNEY. Neate W66.