1878 LECTUEE ON ANIMAL INTELLIGENCE 71 



about time, I suppose it would be best to go when 

 you return home in May, as the onions might possibly 

 be then ready for grafting. Unless, therefore, I hear 

 from you to the contrary, I shall write again some 

 time between the middle and end of May. 



Then came a second appearance at the British 

 Association. Mr. Eomanes was asked to deliver one 

 of the evening lectures at the meeting of 1878, which 

 took place at DubHn. 



The subject was animal intelligence, and seems 

 to have excited a good deal of attention. The follow- 

 ing letters relate to the lecture and to his book on 

 Animal InteUigence : 



To C. Darwin, Esq. 



18 Cornwall Terrace, Eegent's Park, N.W. : June 18. 



Very many thanks for your permission to use your 

 observations, as well as for the additional information 

 which you have supphed. If all the manuscript chapter 

 on instinct is of the same quaKty as the enclosed por- 

 tion, it must be very valuable. Time will prevent me 

 from treating very fully of instinct in my lecture, but 

 when I come to write the book for the International 

 Science Series on Comparative Psychology, I shaU 

 try to say aU that I can on instinct. Your letter, 

 therefore, induces me to say that I hope your notes will 

 be pubhshed somewhere before my book comes out 

 {i.e. within a year or so), or, if you have no intention 

 of pubKshing the notes, that you would, as you say, let 

 me read the manuscript, as the references, &c., would 

 be much more important for the purposes of the book 



