so named by the Director of the Survey because of the 
part I took in the Survey of 1878. 
L^-ter in the days of exploration it gave me es¬ 
pecial pleasure to be able to attach to the charming valley 
containing the mud geysers and other wonders of the part, 
the name of Hayden, in honor of our chief. 
Perhaps the most gratifying episode to me person¬ 
ally came to light as the result of a visit to the Park in 
1928 of two prominent geologists, Professor R. H. Field of 
Princeton University and Professor 0. T. Jones of Manchester, 
England, who, after a summer r s study of the geology of the 
Grand Canyon and its region stopped in Washington to tell me 
that my analysis of the geology of the canyon in 1878 was 
the only correct one up to date. 
In 1873, 74 and 75, we were in Colorado and jp re¬ 
call with pride the fact that within three months I climbed 
11 peaks each near or over 14,000 feet in height, and that 
I was first to reach the summit -in every case. These were: 
Gray, Torrey, Long’s, Pike’s Grizzly, Evarts, Powell, Culebre, 
Sierra Blanco, Lincoln, La Plata and Snow Mass. Many of the 
less important peaks were climbed among which was the Mountain 
of the Holy Cross, the first ascent of which is recorded in 
detail among these episodes and in Volume III of this series. 
These explorations are recorded in many volumes of the nation¬ 
al Surveys, but are too voluminous to be even sketched in 
this place. 
