Volume 4 of 4 of the series: An Arrangement of British Plants : According to the Latest Improvements of the Linnean System : With an Easy Introduction to the Study of Botany, illustrated on copper plates, by William Withering.
No. 35. The Grand Canon of the Colorado, near the foot of To-ro-weap Valley. A view of the south wall of the gorge, as seen from the opposite side. (F.79.). Expedition of 1872. Photographed by William Bell;