236 DARWIN'S LETTERS TO R. TRIMEN 



My women-kind have insisted on coming to London 

 for all March, much to my grief ; but I shall get some 

 good, for I shall see some of my friends, and you amongst 

 the number. 



With very sincere thanks 

 Believe me 



Yours very sincerely 



CH. DARWIN 



I shall go doggedly on collecting facts through the 

 animal kingdom, and possibly at the end some little 

 light may be acquired. I am getting some of the chief 

 domestic animals tabulated. 



In the last sentence of the following letter 

 Darwin was referring to the evening of March 5, 

 1868, when Trimen read his remarkable and 

 important paper, published in the early part 

 of the following year : * On some remarkable 

 Mimetic Analogies among African Butterflies/ 1 

 Bates's classical paper on Mimicry (1862), re- 

 ferred to on pp. 122-6, was concerned with 

 tropical American butterflies and moths. A. R. 

 Wallace's paper 'On the Phenomena of Varia- 

 tion and Geographical Distribution as illustrated 

 by the Papilionidce of the Malayan Region ' - 

 (1866) dealt with the same subject as illustrated 

 by butterflies in the tropical East. Trimen's 

 paper completed the great series by extending 

 the hypothesis of Mimicry to the African con- 

 tinent. The chief example considered in the 

 paper, that of Papilio dardanus (merope), was by 



1 Trans. Linn. Soc. Lo)id., xxvi. 497-522. 

 -' Trans. Linn. Soc. Land., xxv. 1-71. 



