Palæontology of New-York.

Graptolites of the Quebec group. /

Report of the exploring expedition to the Rocky Mountains in the year 1842 :

and to Oregon and north California in the years 1843-44 /

Report on the Geological survey of the state of Iowa :

embracing the results of investigations made during portions of the years 1855, 56 & 57 /

An expedition to the valley of the Great Salt Lake of Utah :

including a description of its geography, natural history, and minerals, and an analysis of its waters; with an authentic account of the Mormon settlement. Illustrated by ... plates, from drawings taken on the spot. Also, a reconnoissance of a new route through the Rocky Mountains. And two large and accurate maps of that region. /