This sketch of the Hunterian collections, which we would gladly have worked out in greater detail had our space allowed us to do so, will perhaps be sufficient to indicate to our readers the nature of the field of research on which Owen was about to enter. It was, in fact, an undiscovered country, of which he was to be the pioneer. One would like to know whether he had any idea of what the work he was about to undertake implied; and whether he had any misgivings as to his own fitness for it. He was only twenty-three years old, so perhaps, as youth is sanguine, he entered upon it with a light heart, thinking—if he paused to think—that he had strength of will sufficient to compensate for defect of years and knowledge. ‘On vieillit vite sur les champs de bataille.’ His previous training must have been in the main professional; he could have gained at most only a glimpse of comparative anatomy at the feet of Dr Barclay; the great writers on the subject, Buffon, Daubenton, Cuvier, and the rest, must have been mere names to him. Moreover, he was obliged, for lucre’s sake, to continue the profession of a surgeon, and, though he gradually dropped it, he must, for some time at least, have spent a good deal of time over it. Besides this, he probably assisted Clift in the brief catalogue of the Hunterian collections that appeared between 1833 and 1840. But, while thus engaged, he found time for study. For three years he attempted no original work; and when he did begin to write (his first paper is dated 9 November, 1830), it is evident that the previous years had been spent in wise preparation. There is no trace of the novice in the papers that followed each other in quick succession; they evince a complete mastery of the subject from the historical, as well as from the anatomical, side. The mere number of these communications, addressed principally to the Zoological Society, is almost past belief. Before the end of 1855 more than 250 had appeared, many of which were of considerable length, and enriched with elaborate drawings made by himself. But what is more surprising still is the versatility displayed in their composition. Nowadays a biologist is compelled to specialize. By ‘the custom of the country,’ to borrow a legal phrase, he selects his own subject, and is expected not to poach on that of his neighbours. But when Owen began to work, these laws existed not, or at any rate not for him. The very nature of his work obliged him to study in quick succession the most diverse structures; and, as death does not accommodate itself to human convenience, he could not tell from day to day what animals would be sent from the Zoological Gardens to his dissecting-room. An excellent bibliography of his works at the end of the second volume of the _Life_ enables us to trace his studies in detail. For our present purpose we will only point out that between 1831 and 1835 he had written papers (among many others) on the orang-outang, beaver, Thibet bear, gannet,