Mr. Huxley said long before: "After much consideration, and with assuredly no bias against Mr. Darwin's views, it is our clear conviction that as the evidence now stands it is not absolutely proved that a group of animals, having all the characteristics exhibited by species in nature, has ever been originated by selection, whether natural or artificial." (_Lay Sermons_, 295.) The theories as to what produced the supposed changes are as many as the writers on Evolution. Prof. Conn says, "All agreement disappears. Each thinker has his own views." And adds, "Thus far we have seen no indication of the manner in which this evolution has been manifested." (p. 20.) Prof. J. Arthur Thomson, lecturer on zoology in the School of Medicine, Edinburgh, said: "Unless we can give some theory of the origin of variations we have no material for further consideration. Unfortunately we are very ignorant about the whole matter." The various writers ascribe the changes to food, climate, sexual selection, extraordinary births, isolation and many other supposed causes. All these have been in turn combatted by other evolutionist writers, and the war goes on and has produced libraries of volumes. It is around this that the conflict rages and the war is a merry one. HOW EVOLUTION ORIGINATED SPECIES. It is when Evolution gives the particulars of these changes that it becomes especially interesting. We will, by way of lighting up the examination, consider a few of the stories it tells us as to how things came. Spencer tells us how the backbone came to be, for the primitive animals had none. Prof. Conn quotes his account as follows: "He thinks the segmentation, the division of the spinal column into vertebrae, arose as the result of strains. Originally the vertebrate was unsegmented, but in bending its body from side to side in locomotion through the water, its spinal column became divided by the action of simple mechanical force." (_Evolution of To-day_, p. 65.) Thus what we usually consider a serious calamity, the breaking of one's backbone, became one of the greatest blessings, for what would we be without flexible backs, with which to follow the meanderings of Evolution? Evolution also tells us how legs originated. The earliest animals were without legs. Some animal in this legless state found on its body some slight excrescences or warts, which aided materially its progress as it wiggled along, and thus it acquired the habit of using these convenient warts. This habit it transmitted to its posterity and they increased the habit until the excrescences, lengthened and strengthened by use, became legs of a rudimentary kind, which by further use developed a system of bones and muscles and nerves and joints such as we have ourselves.