xT. 61.] TO JAMES D. DANA, 627 
equally called into requisition in the case, in a man- 
ner so parallel that there is no drawing any but a 
purely arbitrary distinction between the one and the 
other. 
I conceive one as effective as the other as regards 
the leading on and fixing variation. 
When I say now again that the expression “ fitted 
by its regional development to the region ” conveys no 
clear meaning to me, I am only telling you, as I did 
before, my way of looking at things, ‘oh finding fault 
with yours. 
By the way ; “ variation (inherent) in particular di- 
rections,” is your idea and mine, but is very anti- 
Darwin. Good-night. A. Gray. 
Dr. Gray greatly enjoyed his visit to California, 
with the long overland journey thither. It was an 
ever-renewed excitement to see plants growing which 
he had seen only as dried specimens, and the conduc- 
tor of the train was at last almost in despair at the 
scattering of his passengers to grab what they could 
in the short halts, as they became inspired by seeing 
Dr. Gray rush as the engine slowed, to catch all 
within reach, Then when in motion again the speci- 
mens were brought from all sides to see what they 
were. And the preparing and drying went on to the 
wonder of some and the interest of all. 
His ascent of Gray’s Peak was made a great occasion 
in the neighborhood. A large party gathered from 
Georgetown and Empire City, and started the after- 
noon before, after having been most hospitably dined 
by Judge MceMurdy, in Georgetown; the night was 
passed in a mining-tavern cabin, and the ascent, 
some going on horseback, some on foot, was made the 
