I have said that after reading these notes I feel no doubt that they ought to be published. They claim it both by their intrinsic value and by the light they throw on the religious thought of a scientific man who was not only remarkably able and clear-headed, but also many-sided, as few men are, in his capacities, and singularly candid and open-hearted. To all these qualities the notes which are now offered to the public will bear unmistakeable witness. With more hesitation it has been decided to print also the unpublished essays already referred to. These, as representing an earlier stage of thought than is represented in the notes, naturally appear first. Both Essays and Notes however represent the same tendency of a mind from a position of unbelief in the Christian Revelation toward one of belief in it. They represent, I say, a tendency of one 'seeking after God if haply he might feel after Him and find Him,' and not a position of settled orthodoxy. Even the Notes contain in fact many things which could not come from a settled believer. This being so it is natural that I should say a word as to the way in which I have understood my function as an editor. I have decided the question of publishing each Note solely by the consideration whether or no it was sufficiently finished to be intelligible. I have rigidly excluded any question of my own agreement or disagreement with it. In the case of one Note in particular, I doubt whether I should have published it, had it not been that my decided disagreement with its contents made me fear that I might be prejudiced in withholding it. The Notes, with the papers which precede them, will, I think, be better understood if I give some preliminary account of their antecedents, that is of Romanes' previous publications on the subject of religion.