One little event during this year has fixed itself very firmly in my mind, and I hope that it has done so from my conscience having been afterwards sorely troubled by it; it is curious as showing that apparently I was interested at this early age in the variability of plants! 
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With respect to science, I continued collecting minerals with much zeal. I must have observed insects with some little care. I almost made up my mind to begin collecting all the insects which I could find dead, for on consulting my sister I concluded that it was not right to kill insects for the sake of making a collection.
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Life there was perfectly free; the country was very pleasant for walking or riding; and in the evening there was much very agreeable conversation, not so personal as it generally is in large family parties, together with music. Nothing has left a more vivid picture on my mind than these evenings at Maer.
— from this book
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Autobiography of Charles Robert Darwin, (12 February 1809 – 19 April 1882) was an English naturalist and geologist, best known for his contributions to evolutionary theory. He established that all species of life have descended over time from common ancestors. 
This has been edited by his son Francis Darwin.

Francis Darwin was born in Down House, Downe, Kent in 1848. He was the third son and seventh child of Charles Darwin and his wife Emma.
Darwin went to Trinity College, Cambridge, first studying mathematics, then changing to natural sciences, graduating in 1870. He then went to study medicine at St George’s Medical School, London, earning an MB in 1875, but did not practice medicine.
Francis Darwin worked with his father Charles Darwin on experiments dealing with plant movements, specifically phototropism and they co-authored The Power of Movement in Plants (1880).
Darwin edited The Autobiography of Charles Darwin (1887), and produced some books of letters from the correspondence of Charles Darwin—The Life and Letters of Charles Darwin (1887) and  More Letters of Charles Darwin (1905). He also edited Thomas Huxley’s On the Reception of the Origin of Species (1887). He died on 19 September, 1925.