tO2 MAN [CHAP. Vlll 



Letter 466 carry their tails aloft ? How is this with the rhinoceros ? 

 Do not trouble yourself to answer this, but I shall be in 

 London in a couple of months, and then perhaps you will 

 be able to answer this trifling question. Or, if you write 

 about wolves and jackals turning round, 1 you can tell me 

 about the tails of elephants, or of any other animals. 



Letter 467 To A. D. Bartlett. 



Down, Jan. 5th, [1871 ?] 



Many thanks about Limulus. I am going to ask another 

 favour, but I do not want to trouble you to answer it by letter. 

 When the Callithrix sciureus* screams violently, does it wrinkle 

 up the skin round the eyes like a baby always does ? When 

 thus screaming do the eyes become suffused with moisture ? 

 Will you ask Sutton 3 to observe carefully ? Could you make 

 it scream without hurting it much ? I should be truly obliged 

 some time for this information, when in spring I come to 

 the Gardens. 



Letter 468 To W. Ogle. 



Down, March 7th [1871]. 



I wrote to Tyndall, but had no clear answer, and have 

 now written to him again about odours. 4 I write now to ask 

 you to be so kind (if there is no objection) to tell me the 

 circumstances under which you saw a man arrested for 

 murder 5 I say in my notes made from your conversation : 



1 In the Expression of the Emotions, p. 44, reference is made under the 

 head of " Associated habitual movements in the lower animals," to dogs 

 and other animals turning round and round and scratching the ground 

 with their fore-paws when they wish to go to sleep on a carpet, or other 

 similar surface. 



2 " Humboldt also asserts that the eyes of the Callithrix sciureus 

 ' instantly fill with tears when it is seized with fear ' ; but when this 

 pretty little monkey in the Zoological Gardens was teased, so as to cry 

 out loudly, this did not occur. I do not, however, wish to throw the 

 least doubt on the accuracy of Humboldt's statement." (The Expression 

 of the Emotions in Man and Animals, 1872, p. 137.) 



3 One of the keepers who made many observations on monkeys for 

 Mr. Darwin. 



4 Dr. Ogle's work on the Sense of Smell (Medico-Chirurgical Trans. 

 LI 1 1., p. 268) is referred to in the Expression of the Emotions, p. 256. 



5 Given in the Expression of the Emotions, p. 294. 



