along the front of the Vermilion Cliffs, northwestward as far as 
the Valley of the Virgen, and thence southwestward to view the 
country in the vicinity of the Hurricane fault, and to the west 
of it. Thence we journeyed northward, along the western or drop- 
ped side of the Hurricane fault, and on the 23d of October, we 
reached Fort Cameron, at the town of Beaver in Utah. Here the 
laborers of my Immediate party were discharged and I returned 
without' delay to Washington. 
During the past winter and up to the close of the fiscal year 
ending June 30, 1661, I have been occupied in the preparation of 
a monograph on the Tertiary History of the Grand Canon District. 
The maps have been completed by Mr, Bodfish and Mr. Re ns ha we , the 
former having delineated the Kaibab division of the Grand Canon and 
the surface topography of the southern part of the Kaibab Plateau, 
while the latter has drawn the map of the Uinkaret Plateau. iMr . 
Holmes has redrawn the sketches of the Canon and adjoining regions, 
and the materials are now in the engraver's hands, as are also the 
maps. The manuscript of the monograph, is very nearly completed. 
)) 
