During the War with Mexico, Lieutenants Abert and Peck were enroute to the Pacific with Lieut. Emory as part of General Kearny's Army of the West, but the two were left behind due to illness. They took the opportunity to continue their survey efforts earlier started on Fremont's third expedition. The resulting map is a very detailed look at the Rio Grande Valley and some adjacent areas including the pueblos of Laguna and Acoma. This important map, illustrated in Wheat, is roughly centered on Santa Fe. It details the territory along the Rio Grande from above Taos south to well below Socorro and San Antonio to the ruins at Valverde. Excellent detail of the topography and watershed to either side of the river with the mountains shown via hachure. Filled with place names including numerous villages and small towns, and the Comanche Route from Arkansas. Blank areas to the west and north are labeled Navajo Indians and Utah Indians. This map was issued with Emory's Notes of a Military Reconnaissance in 1848. 10,000 copies were produced for this House of Representatives edition. This lot includes the unbound Abert's report which includes 24 plates. Unbound, title page, pages 417 - 548, 24 plates, 7.3 X 4.3" The plates include: Santa Fe; O-CUM-WHO-WUST; Old Bark's Son AH-MAH-NAH-CO and Squaw; Las Cumbres Espanolas; San Miguel; Ruins of Pecos; The Gold Mountains near Tuerto; Fort Marcy and the Parraquia - Santa Fe; San Felippe; Pueblo de Santo Domingo; Pueblo de Santa Ana; Moquino; Acoma, No. 1; Acoma, No. 2; Acoma, No. 3; View near Rito; El Canon Inferno; Ruins of Abo; Bosque de Apache; Valverde, and four more. Historical and important map complete with its report.

References: Wheat (TMW) 532; Wagner-Camp-Becker 148.5; Howes E145

Condition: C+

Map has been backed with tissue to reinforce and repair a few minor tears and splits along the folds. There is toning along the folds where cello tape, now removed, had previously reinforced the map. Report is disbound with the first few pages loose from text block. Map and report are housed in an attractive, contemporary brown clamshell folder.