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 so immense a superstructure as geological uniformity. If one were at liberty to be as lax in science as in theology, and to assume unity from the start, one might better say so, as the Church did, and not invite attack by appearing weak in evidence. Naturally a young man, altogether ignorant, could not say this to Sir Charles Lyell or Sir Isaac Newton: but he was forced to state Sir Charles's views, which he thought weak as hypotheses and worthless as proofs. Sir Charles himself seemed shy of them. Adams hinted his heresies in vain. At last he resorted to what he thought the bold experiment of inserting a sentence in the text, intended to provoke correction. "The introduction [by Louis Agassiz] of this new geological agent seemed at first sight inconsistent with Sir Charles's argument, obliging him to allow that causes had in fact existed on the earth capable of producing more violent geological changes than would be possible in our own day." The hint produced no effect. Sir Charles said not a word; he let the paragraph stand; and Adams never knew whether the great Uniformitarian was strict or lax in his uniformitarian creed; but he doubted.

Objections fatal to one mind are futile to another, and as far as concerned the Article, the matter ended there, although the glacial epoch remained a misty region in the young man's Darwinism. Had it been the only one, he would not have fretted about it; but uniformity often worked queerly and sometimes did not work as Natural Selection at all. Finding himself at a loss for some single figure to illustrate the law of Natural Selection, Adams asked Sir Charles for the simplest case of uniformity on record. Much to his surprise Sir Charles told him that certain forms, like Terebratula, appeared to be identical from the beginning to the end of geological time. Since this was altogether too much uniformity and much too little selection, Adams gave up the attempt to begin at the beginning, and tried starting at the end,—himself. Taking for granted that the vertebrates would serve his purpose, he asked Sir Charles to introduce him to the first vertebrate. Infinitely to his bewilderment, Sir Charles informed him that the first vertebrate was a very respectable fish, among the earliest of all fossils, which had lived, and whose bones were still reposing, under Adams's own favorite Abbey on Wenlock Edge.

By this time, in 1867, Adams had learned to know Shropshire fami-