From Lamarck I went on to Buffon and Erasmus Darwin—better men both of them than Lamarck, and treated by him much as he has himself been treated by those who have come after him—and found that the system of these three writers, if considered rightly, and if the corollary that heredity is only a mode of memory were added, would get us out of our dilemma as regards descent and design, and enable us to keep both. We could do this by making the design manifested in organism more like the only design of which we know anything, and therefore the only design of which we ought to speak—I mean our own. Our own design is tentative, and neither very far-foreseeing nor very retrospective; it is a little of both, but much of neither; it is like a comet with a little light in front of the nucleus and a good deal more behind it, which ere long, however, fades away into the darkness; it is of a kind that, though a little wise before the event, is apt to be much wiser after it, and to profit even by mischance so long as the disaster is not an overwhelming one; nevertheless, though it is so interwoven with luck, there is no doubt about its being design; why, then, should the design which must have attended organic development be other than this? If the thing that has been is the thing that also shall be, must not the thing which is be that which also has been? Was there anything in the phenomena of organic life to militate against such a view of design as this? Not only was there nothing, but this view made things plain, as the connecting of heredity and memory had already done, which till now had been without explanation. Rudimentary organs were no longer a hindrance to our acceptance of design, they became weighty arguments in its favour. I therefore wrote “Evolution Old and New,” with the object partly of backing up “Life and Habit,” and showing the easy rider it admitted, partly to show how superior the old view of descent had been to Mr. Darwin’s, and partly to reintroduce design into organism. I wrote “Life and Habit” to show that our mental and bodily acquisitions were mainly stores of memory: I wrote “Evolution Old and New” to add that the memory must be a mindful and designing memory. I followed up these two books with “Unconscious Memory,” the main object of which was to show how Professor Hering of Prague had treated the connection between memory and heredity; to show, again, how substantial was the difference between Von Hartmann and myself in spite of some little superficial resemblance; to put forward a suggestion as regards the physics of memory, and to meet the most plausible objection which I have yet seen brought against “Life and Habit.”