(4) That we have positive evidence against _uncontrolled_ evolution (uncontrolled by set plan and design i.e.) and a strong presumption in favour of the existence of created _types_; so that evolution proceeds towards these types by aid of natural laws and forces working together (in a way that our limited faculties necessarily fail to grasp adequately);[1] and so that, the type once reached, a certain degree of variation, but never _transgression_ of _the type_, is possible. Further, that on this supposition we are able to account for some of the unexplained facts in evolutionary history, such as _reversion_ and the _sterility of hybrids_; and to see why there are gaps which cannot be bridged over, and which by extreme theorists are only feebly accounted for on the supposition that as discovery progresses they _will_ be bridged over some day. [Footnote 1: "Also He hath set the world in their heart, so that _no man can find out the work that God maketh_ from the beginning to the end" (Eccles. iii II).] (5) Lastly, that there is no possibility of giving _time_ enough on any possible theory of the world's existence, for the evolution of all species, unless _some_ reasonable theory of creative arrangement and design be admitted. The great objection--the descent of man and the introduction of reason, consciousness, and so forth, into the world, will then form two separate chapters, concluding the first division of my subject. There is one point which the reader may be surprised to see omitted. It is, that if these slow changes were always going on, why is not the present world full of, and the fossil-bearing rocks also abounding in, _intermediate forms_, creatures which _are on their way_ to being something else? But there are reasons to be given on this ground which make the subject a less definite one for treatment. It is said, for example, that in the fossil rocks we have only such scanty and fragmentary records, that it is not possible to draw a complete inference, and that there is always the possibility of fresh discoveries being made. Such discoveries have, it is asserted, already been made in the miocene and again in later rocks; different species of an early form of _horse_ which are (and this we may admit) the ancestral or intermediate forms of our own horse, have been found. I therefore would not press the difficulty, great as it is, because of the escape which the hope of future discovery always affords. I will take this opportunity to repeat that in this chapter I say nothing about the difficulty which arises from the introduction of elementary reason or instinct, and of consciousness, into the scale of organic being; that will more appropriately fall in with the consideration of the development of man, where naturally the difficulty occurs with its greatest force.