U.S. Geographical Surveys West of the 100th Meridian. "Plate VIII.--This view, sketched by Mr. Gilbert Thompson in 1873, from Echo Peak, opposite the mouth of the Paria, marks substantially the commencement of the main or lower Grand Cañon of the Colorado River ..."--v. 1, p. 74. Scanned raster image of original: 1 print : lithograph, sepia ; image and text 25 x 15 cm. Original in the David
... [Show full abstract] Rumsey Collection; scanned by Cartography Associates.