months; while, the longer he read, the more he wondered, pondered, doubted what his delightful old friend Sir Charles Lyell would have said about it.
Truly the animal that is to be trained to unity must be caught young. Unity is vision; it must have been part of the process of learning to see. The older the mind, the older its complexities, and the further it looks, the more it sees, until even the stars resolve them selves into multiples; yet the child will always see but one. Adams asked whether geology since 1867 had drifted towards unity or multiplicity, and he felt that the drift would depend on the age of the man who drifted.
Seeking some impersonal point for measure, he turned to see what had happened to his oldest friend and cousin the ganoid fish, the Pteraspis of Ludlow and Wenlock, with whom he had sported when geological life was young; as though they had all remained together in time to act the Mask of Comus at Ludlow Castle, and repeat "how charming is divine philosophy!" He felt almost aggrieved to find Walcott so vigorously acting the part of Comus as to have flung the ganoid all the way off to Colorado and far back into the Lower Trenton limestone, making the Pteraspis as modern as a Mississippi gar-pike by spawning an ancestry for him, indefinitely more remote, in the dawn of known organic life. A few thousand feet, more or less, of limestone were the liveliest amusement to the ganoid, but they buried the uniformitarian alive, under the weight of his own uniformity. Not for all the ganoid fish that ever swam, would a discreet historian dare to hasard even in secret an opinion about the value of Natural Selection by Minute Changes under Uniform Conditions, for he could know no more about it than most of his neighbors who knew nothing; but natural selection that did not select,—evolution finished before it began,—minute changes that refused to change anything during the whole geological record,—survival of the highest order in a fauna which had no origin,—uniformity under conditions which had disturbed everything else in creation,—to an honest-meaning though ignorant student who needed to prove Natural Selection and not assume it, such sequence brought no peace. He wished to be shown that changes in form caused evolution in force; that chemical or mechanical
