Relationship with Charles Darwin
Caroline was a mother-like figure to the younger siblings including her brother Charles. In his memory she occupied a space normally reserved for a parent: the first thing he ever remembered was sitting on Caroline's lap. When thinking about the childhood Darwin spoke of being looked after, tutored and, periodically, told off by his elder sister. Although Caroline took her duty of care rather seriously and was capable of being strict, she doted on Charles. She referred to him as 'my dear Bobby' and looked 'so happy and proud' when the younger brother returned home from his Beagle expedition. She was worried about his health and safety abroad, but confessed to Elizabeth Wedgwood: 'Now we have him really again at home I intend to begin to be glad he went this expedition & now I can allow he has gained happiness & interest for the rest of his life'. Of course, Caroline kept every little scrap of paper sent by Darwin from his travels including the extracts from the voyaging journals.
The two siblings maintained a close relationship for their entire life, regularly paying each other visits and exchanging letters. Text and Network analysis of Darwin correspondence reveals that in contrast to some other female family members, for example his wife and other sisters, Caroline was actively engaged in the scientific discussions with her brother. She expressed opinions and questioned Charles on a whole range of topics and he tended to take her input seriously. On one occasion Charles wrote to Caroline: 'Your doubt and queries are perfectly correct. Lyell was bothered on same point and I have not expressed myself clearly'. The point in question is the descent of the domesticated species that Charles Darwin and the Scottish geologist Charles Lyell were corresponding on in 1859. Darwin then continues his letter to Caroline with a detailed clarification of how the differences in the domestic dogs relate to the process of their domestication.
It has been well established that Darwin used the family as a casual sounding board for his ideas, but his letters to Caroline often go beyond that in their content and contain the amount of scientific details comparable in variety and specificity to those found in the correspondence with his close friend and cousin William Fox as well as with some of the colleagues. What is more, Darwin repeatedly asked Caroline to do some background research for him to establish certain facts or to summarise the content of someone else's work. In one of the letters Darwin's younger sister Catherine passes the following information to him: 'Caroline desires me to tell you that neither Procter, Miers, nor Caldcleugh are in the Library, only Head, which C. [Caroline] will read, and examine about what you mention, and then write to you'. At this time Darwin was working on the presentation for the Geological Society of London on his on his theory of sea floor uplift along the Chilean coast line and the 3 books Caroline couldn't get hold of were: Robert Proctor, Narrative of a Journey across the Cordillera of the Andes and of a Residence in Lima,
John Miers, Travels in Chile and La Plata - Including Accounts Respecting the Geography, Geology, Statistics, Government, Finances, Agriculture, Manners and Customs, and the Mining Operations in Chile,
and Alexander Caldcleugh, Travels in South America, During the Years 1819-20-21 - Containing an Account of the Present State of Brazil, Buenos Ayres and Chile. The book that Caroline found and pre-processed for her brother's research was Francis Bond Head's Rough Notes Taken during some Rapid Journeys across the Pampas and among the Andes (1826).
Charles Darwin has clearly trusted his sister to summarise and assemble material for him otherwise he wouldn't have asked for her help over and over again. At the same time, Caroline's time and efforts were taken for granted. When Darwin asked Fox for his assistance he spoke at length about how he didn't want to trouble William:
'the smallest contributions, thankfully accepted—descriptions of offspring of all crosses between all domestic birds & animals dogs, cats &c &c very valuable— Don't forget, if your half-bred African Cat should die, that I should be very much obliged, for its carcase sent up in little hamper for skeleton.— it or any cross-bred pigeon, fowl, duck, &c &c will be more acceptable than the finest haunch of Venison or the finest turtle.— Perhaps all this will only bothers you— So I will add no more...'.
In contrast when a request was sent to Caroline it sounded like:
'Now will you be a good lady & look at Ellis' Polynesian Researches, & see if he does not at Tahiti make some remarks about the belief that Capt. Cook's visits produced some kinds of illness'.
This difference in tone reveals a casual misogyny that permeated the 19th century society. Even the most enlightened of men surrounded by numerous real life examples of capable women failed to question the status quo and thought a man to be ultimately 'superior to woman'.
In his book The Descent of Man Charles Darwin stated:
'The chief distinction in the intellectual powers of the two sexes is shewn by man's attaining to a higher eminence, in whatever he takes up, than can woman - whether requiring deep thought, reason, or imagination, or merely the use of the senses and hands'.
Perhaps, this is why Caroline has never been credited by her younger brother for her assistance in his research.