At the close of 1860, the Canton of Vaud having opened a competition on the Principles of Taxation, "the little lady with a straw hat," as her neighbors familiarly called her, handled the subject so thoroughly that her memoir, entitled _Théorie de l'Impôt et Dime sociale_ (Theory of the Impost and Social Tithe, 1862), won her the honor of dividing the prize with Proudhon. While not all the ideas set forth in this work were new, she took care at least to co-ordinate the systems of her predecessors, to select from the one and the other of them what was good in them, and to condense into a homogeneous whole works which were scattered hither and thither. But we will pass over these books of her youth to dwell more at large on that part of her work which will assure Madame Royer an honorable place among the most zealous promoters and ablest defenders of the Darwinian theories. Her first effort in this line was to translate into French, in 1862, the Origin of Species of the great English naturalist, preceding the work with a preface which in itself alone constituted an excellent summary of the doctrine of evolution. She pointed out the results which logically follow from the transformist theory. She did not conceal from herself that in doing thus she would be the object of attacks from the immobilist and ecclesiastical parties still so numerous thirty years ago in all civilized countries; but she flattered herself, too, and with just reason, that she would furnish the liberals and progressives of France with a powerful weapon. In this introductory chapter she characterized the original and strong personality of Darwin in appropriate terms, saying: "While he has not the brilliant qualities of a Cuvier as a writer or a professor, he is at least a worthy heir of the profoundly philosophical science of the two Geoffroys Saint-Hilaire ... one of those workmen who cut their stone with an indefatigable courage. But there are also thicker and heavier stones, without beauty or apparent grace, which are designed to be hidden at the base of an immense edifice, like the massive columns with which the architects of the middle ages decorated the crypts of their Gothic cathedrals. It is truth in the rough. He does not impose his condition, but communicates it and proves it. If it is certain, he affirms it; when he supposes, he says so; when he doubts, he acknowledges it." She then passes to the exposition of Darwinism as responding to one of the noblest aspirations of the mind, the preliminary step to the accounting for the world of organized beings, as astronomy, physics, and geology have explained the origin of inanimate substances. In effect, the illustrious Englishman, connecting the domain of botany and zoölogy with the action of second causes, sought first to comprehend the genesis, and then the evolution, in the same way that astronomers and geologists teach us concerning the origin of our globe and the successive phases through