[2], 101 pp. Folding lithographed map. (8vo) 23x15 cm (9x6"), original printed wrappers.
Rare separate report from the Wheeler Survey, with a significant and uncommon map. The map, by H.G. Prout under Ruffner's direction, is "Preliminary map of the surveys of Colorado made on reconnaissance in the Ute country," 52x67.5 cm, with the headwaters of the Rio Grande and points north.
Provenance: Ross Valley Book Company, 11/89
References: Wheeler, Report..., Vol.I. Geographical Report, App.F, pp 641-643, summarizes expedition and takes note of report and map. W-TW, Vol.5, p 316 refers to Wheeler, but has not seen report or map. The report as a separate and map appear to be rare.