Buffon was in some particulars unqualified for the laborious duty he had undertaken. He delighted to indulge in broad and general views, and to permit his imagination to luxuriate in striking descriptions. But he had neither the patience, nor the love of accuracy, which would have carried him into those minute details which give to natural history its highest value. He, however, had the merit and the good fortune, in the early stages of his undertaking, to associate himself with a fellow-labourer who possessed those qualities in which he was deficient. The first fifteen volumes of ‘_L’Histoire Naturelle_,’ which treat of the theory of the earth, the nature of animals, and the history of man and viviparous quadrupeds, were published between 1749 and 1767, as the joint work of Buffon and Daubenton. The general theories, the descriptions of the phenomena of nature, and the pictures of the habits of animals, were by Buffon. Daubenton confined himself to the precise delineation of their physical character, both in their external forms and their anatomy. But Daubenton refused to continue his assistance in the ‘History of Birds;’ for Buffon, unwilling that the fame which he had acquired should be partaken by one whom he considered only as a humble and subordinate labourer, allowed an edition of the History of Quadrupeds to be published, of which the descriptive and anatomical parts had been greatly abridged. In the History of Birds, therefore, Buffon had to seek for other associates; and the form of the work was greatly changed from that of the previous volumes. The particular descriptions are here very meagre, and anatomical details are almost entirely excluded. In some of the volumes, Buffon was assisted by Guéneau de Montbeillard, who, instead of endeavouring to attain the accuracy of Daubenton, affected to imitate the style of his employer. To the three last volumes of the Birds the Abbé Bexon lent his aid. The nine volumes of Birds appeared between 1770 and 1783. Buffon published alone his ‘History of Minerals,’ which appeared in five volumes, between 1783 and 1788. Seven volumes of Supplements complete the Natural History. The first appeared in 1773; the last was not published till the year after its author’s death, in 1789. The fifth volume of these Supplements is a distinct work, the Epochs of Nature[3]. Footnote 3: The best edition of the works of Buffon is the first, of 36 vols. 4to.