In 1845, he won his M. B. London with honours in anatomy and physiology, and after a few months' practice at the East End, applied, at the instance of his senior fellow-student, Mr. (afterwards Sir) Joseph Fayrer, for an appointment in the medical service of the Navy. At the end of two months he was fortunate enough to be entered on the books of Nelson's old ship, the Victory, for duty at Haslar Hospital. His official chief was the famous Arctic Explorer, Sir John Richardson, through whose recommendation he was appointed, seven months later, assistant surgeon of the Rattlesnake. That ship, commanded by Captain Owen Stanley, was commissioned to survey the intricate passage within the Barrier Reef skirting the eastern shores of Australia, and to explore the sea lying between the northern end of that reef and New Guinea. It was the best apprenticeship to what was eventually the work of Huxley's life--the solution of biological problems and the indication of their far-reaching significance. Darwin and Hooker had passed through a like marine curriculum. The former served as naturalist on board the Beagle when she sailed on her voyage round the world in 1831; the latter as assistant-surgeon on board the Erebus on her Antarctic Expedition in 1839. Fortune was to bring the three shoulder to shoulder when the battle against the theory of the immutability of species was fought. During his four-years' absence Huxley, in whom the biologist dominated the doctor, made observations on the various marine animals collected. These he sent home to the Linnæan Society in vain hope of acceptance. A more elaborate paper to the Royal Society, communicated through the Bishop of Norwich (author of a book on birds, and father of Dean Stanley), secured the coveted honour of publication, and on Huxley's return in 1850 a "huge packet of separate copies" awaited him. It dealt with the anatomy and affinities of the Medusæ, and the original research which it evidenced justified his election in 1851 to the fellowship of the society whose presidential chair he was in after years to adorn. He would seem to have won the blue ribbon of science _per saltum_. Probably, so far as their biological value is concerned, nothing that he did subsequently has surpassed his contributions to scientific literature at that period; but if his services to knowledge had been limited to the class of work which they represent, he would have remained only a distinguished specialist. Further recognition of his well-won position came in the award of the society's royal medal. But fellowships and medals keep no wolf from the door, and Huxley was a poor man. After vain attempts to obtain, first, a professorship of physiology in England, and then a chair of natural history at Toronto (Tyndall was at the same time an unsuccessful candidate for the chair of physics in the same university), a settled position was secured by Sir Henry de la Beche's offer of the professorship of palæontology and of the