I note that you have been good enough to pass my questions on to Mr. Greene, whose great kindness (already experienced by me) will, I trust, prevent him from thinking that the failure of the seeds to flower here was due to any negligence on my part. Yes, it is the same Rev. Mr. Gulick whom you describe that wrote the paper on 'Divergent Evolution' to which I alluded, and which is a most remarkable paper in every way, though not at all easy to master. Wallace completely misunderstood it in his letter to 'Nature.' It was his work in shells that first led Mr. Gulick to study Isolation, and he has been at work upon the subject ever since. To the best of my judgment, he has demonstrated the necessity of what he calls 'segregate breeding' for 'polytypic evolution,' and in this connection has worked out the idea of physiological selection (which he calls segregate fecundity) much more fully than I have. It is most astonishing to me with what a storm of opposition this idea has been met in England, and how persistent is the misunderstanding. In Germany and America it is being much more fairly treated, but meanwhile I intend to keep it as quiet as possible, till I shall be in a position to publish a large body of experimental observations. As far as time has hitherto allowed, the results are strongly corroborative of the theory. I have now read your admirable book, and my only objection to it is that it seems in such large measure to anticipate the publication of my own course of lectures on the theory of Evolution which I am now giving at the Royal Institution. But, on the other hand, this will relieve me of the necessity of printing a good deal of my matter, as it will be sufficient to refer to your book in mine when the two cover common ground. It is needless to add that I am very glad to note you think so well of physiological selection. Yours very truly, G. J. ROMANES. The theory of the Non-Inheritance of Acquired Characters, with which Professor Weismann's name is inseparably connected, was now coming to the front. Mr. Romanes was, of course, intensely interested, and set himself _not_ to dispute so much as to examine and to test it. He devoted a large part of his last year at the Royal Institution to lecturing on Prof. Weismann's theory, which lectures he worked up into his book, 'An Examination of Weismannism,' published in 1892. He devised many experiments to test that theory, experiments which have a pathetic interest for those who love him, for they occupied his mind up to the very day of his death. Of this theory it may safely be said that since the promulgation of Mr. Darwin's great doctrine, no problem has interested the world of science so profoundly.