x
sciureus screams violently, does it wrinkle up the skin round the eyes
like a baby always does? (467/1. "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, page 137.) When thus screaming do the eyes become suffused with
moisture? Will you ask Sutton to observe carefully? (467/2. One of the
keepers who made many observations on monkeys for Mr. Darwin.) 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. (468/1. Dr. Ogle's work on the Sense of Smell
("Medico-Chirurgical Trans." LIII., page 268) is referred to in the
"Expression of the Emotions," page 256.) 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. (468/2. Given in the "Expression of
the Emotions," page 294.) I say in my notes made from your conversation:
utmost horror--extreme pallor--mouth relaxed and open--general
prostration--perspiration--muscle of face contracted--hair observed on
account of having been dyed, and apparently not erected. Secondly, may
I quote you that you have often (?) seen persons (young or old? men
or women?) who, evincing no great fear, were about to undergo severe
operation under chloroform, showing resignation by (alternately?)
folding one open hand over the other on the lower part of chest (whilst
recumbent?)--I know this expression, and think I ought to notice it.
Could you look out for an additional instance?

I fear you will think me very troublesome, especially when I remind you
(not that I am in a hurry) about the Eustachian tube.

LETTER 469. TO J. JENNER WEIR. Down, June 14th [1870].

As usual, I am going to beg for information. Can you tell me whether
any Fringillidae or Sylviadae erect their feathers when frightened or
enraged? (469/1. See "Expression of the Emotions," page 99.) I want to
show that this expression is common to all or most of the families of
birds.