zoom O'Sullivan Geographical and Geological Explorations and Surveys West of the 100th Meridian Spread 1

zoom O'Sullivan Geographical and Geological Explorations and Surveys West of the 100th Meridian Spread 1 versozoom O'Sullivan Geographical and Geological Explorations and Surveys West of the 100th Meridian Spread 1 recto
p. 2 & 3