Robert Chambers stands by himself. He was of the best class of self-made men, and as a publisher perhaps even more than as a writer did service to literature. He had great talent for not only acquiring information but making it popular. His most remarkable book, the _Vestiges of the Natural History of Creation_ (1844), was published anonymously, and, in fear of the outcry of orthodoxy, extraordinary precautions were taken to guard the secret of the authorship. For a long time the efforts were successful, and, though the secret gradually became an open one, it was not till 1884 that his responsibility for the book was authoritatively avowed. The _Vestiges of Creation_ has been unduly depreciated since the time of Darwin. The gaps in the argument, and still more perhaps the untenable assumptions and mistaken assertions, are easy to detect now; but it is at least ungracious to insist upon them. Chambers was not an accomplished naturalist; on the contrary, Huxley charges him with 'prodigious ignorance.' He had not laboured as long, as patiently or as strenuously at the subject as Darwin; but at the same time his book is in an uncommon degree bold and suggestive. The best minds were already dallying with the idea of evolution, but in 1844 there nowhere existed in English such a concrete and clear presentation of it as Chambers gave. Judged in relation to what was known and thought then, his work was a memorable, though, from lack of a sufficiently firm foundation, hardly a great one. [Sidenote: Charles Robert Darwin (1809-1882).] Charles Robert Darwin is the true father of evolution as applied in modern science, and of all the men of science of the century he most demands and deserves attention in connexion with literature. No recent doctrine, either in science or philosophy, has produced anything comparable to the revolution in thought caused by _The Origin of Species_. Its central ideas have been applied not merely in the department of biology, but everywhere in the world of thought,--in philosophy, in religion, in literature and literary criticism. We cannot refer all this to Darwin alone, for the conception of evolution can be traced for two thousand years or more; but it was Darwin who first planted it firmly in the human mind, and consequently he is the chief though not the sole cause of the revolution. Another element of his greatness, important in a criticism of literature, is that his works are themselves literature. Writing a perfectly plain style, he yet succeeds in so expressing his meaning that the manner is no inconsiderable part of his charm. Some of the less compressed works, like the _Naturalist's Voyage round the World_ and the monograph on earthworms, are as fascinating and as difficult to relinquish as a skilful story of adventure; and if this cannot be said of _The Origin of Species_ itself, the reason is that it is so packed with thought that the reader is compelled to pause over it.