It was very foolish of me to demur to your lines of conveyance like the threads in muslin, knowing how you have considered the subject, but still I must confess I cannot feel quite easy. Every one, I suppose, thinks on what he has himself seen, and with Drosera, a bit of meat put on any one gland on the disc causes all the surrounding tentacles to bend to this point; and here there can hardly be differentiated lines of conveyance. It seems to me that the tentacles probably bend to that point whence a molecular wave strikes them, which passes through the cellular tissue with equal ease in all directions in this particular case. But what a fine case that of the Aurelia is! Forgive me for bothering you with another note. Yours very sincerely, C. DARWIN. _From G. J. Romanes to C. Darwin, Esq._ Dunskaith, Ross-shire, N.B.: August 13, 1877. I thought you had given me quite enough praise in your first letter, but am not on that account the less pleased at the high compliment you pay me in the second one. The ending up was what the people at the Institution[13] seemed to like best. Pray do not think that I have yet made up my mind about the 'muslin.' On the contrary, the more I work at the tissues of Aurelia the more puzzled I become, so that I am thankful for all criticisms. If Aurelia stood alone, I should be inclined to take your view, and attribute blocking of contractile waves in spiral strips, &c., to some accidental strain previously suffered by the tissue at the area of blocking. But the fact that in Tiaropsis the polypite is so quick and precise in localising a needle prick, seems to show that here there must be something more definite in the way of conducting tissue than in Drosera, although I confess it is most astonishing how precise the localising function, as described by you, is in the latter. In 'Nature' I did not express my doubts, but it was because I feared there may yet turn out to be a skeleton in the cupboard that I kept all these more or less fishy deductions out of the R.S. papers. Further work may perhaps make the matter more certain one way or another. Possibly the microscope may show something, and so I have asked Schäfer to come down, who, as I know from experience, is what spiritualists call 'a sensitive'--I mean he can see ghosts of things where other people can't. But still, if he can make out anything in the jelly of Aurelia, I shall confess it to be the best case of clairvoyance I ever knew.