The Linnean Society paper went off admirably. There was a larger attendance than ever I saw there before. But this may have been partly due to the president (Lubbock) having had a paper down for the same evening. He was considerate enough to withdraw it at the last moment so as to leave all the evening for mine. I spoke for an hour and a half, and the discussion lasted another hour. The paper itself I have brought with me here, and am now putting the last touches upon it. Probably I shall have to try the rat experiment again, if the young ones show no signs of piebalding. But look at them occasionally to see. There would be no use in getting the parrot to make a gesture sign at the same time as he makes a verbal one; for, as you say, he would only show that he can establish an association between a phrase and a thing (whether object, quality, or action), and about this there is no question. The question is whether he can use verbal signs, not only as stereotyped in phrases (when they are really equivalent to only one word), but as movable types, which he can transpose for the purpose of expressing _different_ ideas with the _same_ words. He writes concerning a Junior Scientific Society which had a meeting to discuss his theory: 'The meeting was the best fun imaginable, the paper was merely a statement of my theory by a young man who made it very clear. ---- got up and expressed disapproval of the theory, but expressly declined to argue, so I had merely to give him some chaff. The young men highly enjoyed it. Afterwards they were enthusiastic in their applause. 'I have no doubt, if I had not been present, the class would have had a very different impression both of me and my theory.' _To Professor Meldola._ Geanies: September 16, 1886.