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自2000年以来，剑桥大学图书馆一直缺少达尔文的笔记，现在普遍认为该笔记已被盗。笔记中包含了达尔文著名的生命之树草图（右上图），探索物种之间的进化关系。不过数字副本仍然存在。
 
自2000年以来，剑桥大学图书馆一直缺少达尔文的笔记，现在普遍认为该笔记已被盗。笔记中包含了达尔文著名的生命之树草图（右上图），探索物种之间的进化关系。不过数字副本仍然存在。
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===Overwork, illness, and marriage===
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=== Overwork, illness, and marriage 劳累，疾病和婚姻 ===
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As Darwin worked under pressure, his health suffered. On 20 September he had "an uncomfortable palpitation of the heart", so his doctors urged him to "knock off all work" and live in the country for a few weeks. After visiting Shrewsbury he joined his Wedgwood relatives at Maer Hall, Staffordshire, but found them too eager for tales of his travels to give him much rest. His charming, intelligent, and cultured cousin Emma Wedgwood, nine months older than Darwin, was nursing his invalid aunt. His uncle Josiah pointed out an area of ground where cinders had disappeared under loam and suggested that this might have been the work of earthworms, inspiring "a new & important theory" on their role in soil formation, which Darwin presented at the Geological Society on 1 November 1837.
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由于达尔文在压力下工作，他的健康受到了影响。9月20日，他”心悸不适” ，因此医生敦促他”停止一切工作” ，在乡下生活几个星期。在访问什鲁斯伯里之后，他加入了在斯塔福德郡梅尔霍尔的韦奇伍德亲戚们，但是他发现他们太热衷于他的旅行故事，以至于不能给他足够的休息。他迷人、聪明、有教养的表妹艾玛 · 韦奇伍德，比达尔文大九个月，正在照顾他生病的姨妈。他的叔叔约西亚指出了一块地面，那里的煤渣已经消失在壤土之下，他认为这可能是蚯蚓的工作，启发了关于蚯蚓在土壤形成中的作用的“一个新的重要理论” ，达尔文于1837年11月1日在地质学会上提出了这个理论。
      
{{See also|Charles Darwin's health}}
 
{{See also|Charles Darwin's health}}
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While developing this intensive study of transmutation, Darwin became mired in more work. Still rewriting his ''Journal'', he took on editing and publishing the expert reports on his collections, and with Henslow's help obtained a Treasury grant of [[pound sterling|£]]1,000 to sponsor this multi-volume ''[[Zoology of the Voyage of H.M.S. Beagle]]'', a sum equivalent to about £{{formatnum:{{inflation|UK|1000|1837|r=-3}}}} in {{#expr:{{CURRENTYEAR}}-2}}.{{inflation-fn|UK}} He stretched the funding to include his planned books on geology, and agreed to unrealistic dates with the publisher.<ref>{{Harvnb|Browne|1995|pp=367–369}}</ref> As the [[Victorian era]] began, Darwin pressed on with writing his ''Journal'', and in August 1837 began correcting [[Galley proof|printer's proofs]].<ref>{{harvnb|Keynes|2001|p=[http://darwin-online.org.uk/content/frameset?viewtype=text&itemID=F1925&pageseq=21 xix]}}</ref>
 
While developing this intensive study of transmutation, Darwin became mired in more work. Still rewriting his ''Journal'', he took on editing and publishing the expert reports on his collections, and with Henslow's help obtained a Treasury grant of [[pound sterling|£]]1,000 to sponsor this multi-volume ''[[Zoology of the Voyage of H.M.S. Beagle]]'', a sum equivalent to about £{{formatnum:{{inflation|UK|1000|1837|r=-3}}}} in {{#expr:{{CURRENTYEAR}}-2}}.{{inflation-fn|UK}} He stretched the funding to include his planned books on geology, and agreed to unrealistic dates with the publisher.<ref>{{Harvnb|Browne|1995|pp=367–369}}</ref> As the [[Victorian era]] began, Darwin pressed on with writing his ''Journal'', and in August 1837 began correcting [[Galley proof|printer's proofs]].<ref>{{harvnb|Keynes|2001|p=[http://darwin-online.org.uk/content/frameset?viewtype=text&itemID=F1925&pageseq=21 xix]}}</ref>
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Darwin chose to marry his cousin, [[Emma Wedgwood.]]
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While developing this intensive study of transmutation, Darwin became mired in more work. Still rewriting his Journal, he took on editing and publishing the expert reports on his collections, and with Henslow's help obtained a Treasury grant of £1,000 to sponsor this multi-volume Zoology of the Voyage of H.M.S. Beagle, a sum equivalent to about £92,000 in 2018.[83] He stretched the funding to include his planned books on geology, and agreed to unrealistic dates with the publisher.[84] As the Victorian era began, Darwin pressed on with writing his Journal, and in August 1837 began correcting printer's proofs.
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达尔文选择了和他的表妹结婚[艾玛 · 韦奇伍德]
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在深入这项关于演变的研究中，达尔文被工作占据了所有。他仍在重写他的日记，负责编辑和发布其采集化石标本相关的专家报告，同时在汉斯洛的帮助下，他获得了£1,000的财政部拨款，以赞助这本多卷动物学著作《H.M.S.猎犬号》。这本书2018年的总价约为92,000英镑。他节省着这笔资金，来完成计划中的地质类书刊，并与出版商商定了不切实际的发行日期。后来随着维多利亚时代的开始，达尔文于1837年8月开始更正打印机的样张。
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As Darwin worked under pressure, his health suffered. On 20 September he had "an uncomfortable palpitation of the heart", so his doctors urged him to "knock off all work" and live in the country for a few weeks. After visiting Shrewsbury he joined his Wedgwood relatives at [[Maer Hall]], Staffordshire, but found them too eager for tales of his travels to give him much rest. His charming, intelligent, and cultured cousin [[Emma Darwin|Emma Wedgwood]], nine months older than Darwin, was nursing his invalid aunt. His uncle [[Josiah Wedgwood II|Josiah]] pointed out an area of ground where cinders had disappeared under [[loam]] and suggested that this might have been the work of [[earthworm]]s, inspiring "a new & important theory" on their role in [[pedogenesis|soil formation]], which Darwin presented at the Geological Society on 1 November 1837.<ref>{{Harvnb|Desmond|Moore|1991|pp= 233–234}}<br />{{cite web|url=http://www.darwinproject.ac.uk/darwinletters/calendar/entry-404.html|title=Darwin Correspondence Project&nbsp;– Letter 404&nbsp;– Buckland, William to Geological Society of London, 9 Mar 1838|accessdate=23 December 2008|url-status=live|archiveurl=https://web.archive.org/web/20090629192234/http://www.darwinproject.ac.uk/darwinletters/calendar/entry-404.html|archivedate=29 June 2009}}</ref>
 
As Darwin worked under pressure, his health suffered. On 20 September he had "an uncomfortable palpitation of the heart", so his doctors urged him to "knock off all work" and live in the country for a few weeks. After visiting Shrewsbury he joined his Wedgwood relatives at [[Maer Hall]], Staffordshire, but found them too eager for tales of his travels to give him much rest. His charming, intelligent, and cultured cousin [[Emma Darwin|Emma Wedgwood]], nine months older than Darwin, was nursing his invalid aunt. His uncle [[Josiah Wedgwood II|Josiah]] pointed out an area of ground where cinders had disappeared under [[loam]] and suggested that this might have been the work of [[earthworm]]s, inspiring "a new & important theory" on their role in [[pedogenesis|soil formation]], which Darwin presented at the Geological Society on 1 November 1837.<ref>{{Harvnb|Desmond|Moore|1991|pp= 233–234}}<br />{{cite web|url=http://www.darwinproject.ac.uk/darwinletters/calendar/entry-404.html|title=Darwin Correspondence Project&nbsp;– Letter 404&nbsp;– Buckland, William to Geological Society of London, 9 Mar 1838|accessdate=23 December 2008|url-status=live|archiveurl=https://web.archive.org/web/20090629192234/http://www.darwinproject.ac.uk/darwinletters/calendar/entry-404.html|archivedate=29 June 2009}}</ref>
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William Whewell pushed Darwin to take on the duties of Secretary of the Geological Society. After initially declining the work, he accepted the post in March 1838. Despite the grind of writing and editing the Beagle reports, Darwin made remarkable progress on transmutation, taking every opportunity to question expert naturalists and, unconventionally, people with practical experience in selective breeding such as farmers and pigeon fanciers. Over time, his research drew on information from his relatives and children, the family butler, neighbours, colonists and former shipmates. He included mankind in his speculations from the outset, and on seeing an orangutan in the zoo on 28 March 1838 noted its childlike behaviour.
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As Darwin worked under pressure, his health suffered. On 20 September he had "an uncomfortable palpitation of the heart", so his doctors urged him to "knock off all work" and live in the country for a few weeks. After visiting Shrewsbury he joined his Wedgwood relatives at Maer Hall, Staffordshire, but found them too eager for tales of his travels to give him much rest. His charming, intelligent, and cultured cousin Emma Wedgwood, nine months older than Darwin, was nursing his invalid aunt. His uncle Josiah pointed out an area of ground where cinders had disappeared under loam and suggested that this might have been the work of earthworms, inspiring "a new & important theory" on their role in soil formation, which Darwin presented at the Geological Society on 1 November 1837.
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威廉 · 惠威尔推动达尔文担任地质学会秘书的职务。在最初拒绝这项工作后，他于1838年3月接受了这个职位。尽管撰写和编辑贝格尔号的报告是一件苦差事，但达尔文在转化方面取得了显著的进步，他抓住每一个机会向博物学专家和非传统的、在人工选择有实际经验的人，比如农民和鸽子爱好者提出质疑。随着时间的推移，他的研究从他的亲戚和孩子，家庭管家，邻居，殖民地居民和以前的船友那里获得信息。他从一开始就把人类纳入自己的推测之中，1838年3月28日在动物园看到一只猩猩时，他注意到了猩猩幼稚的行为。
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由于达尔文在强压下工作，他的健康因此受到了影响。9月20日，他的心脏感到“不舒服”，他的医生敦促他“放弃所有工作”，并在该国生活几周。在拜访了什鲁斯伯里之后，他回到了他在斯塔福德郡梅尔大厅的韦奇伍德亲戚家，但发现他们太渴望他的旅行故事，无法给他更多的休息。他有个迷人，聪明，有教养的表姐艾玛·韦奇伍德Emma Wedgwood，比达尔文大九个月，正在照顾他身残的姨妈。他的叔叔约西亚Josiah曾提到过在一块土壤下面消失的煤渣，并暗示这可能是蠕虫的行为，这启发他们思考一个“全新的重要理论”，关于蠕虫在土壤行程中的作用。达尔文于1837年11月1日在地质学会上发表相关论文。
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[[File:Emma Darwin.jpg|thumb|left|alt=Three quarter length portrait of woman aged about 30, with dark hair in centre parting straight on top, then falling in curls on each side. She smiles pleasantly and is wearing an open necked blouse with a large shawl pulled over her arms|Darwin chose to marry his cousin, [[Emma Wedgwood]].]]
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The strain took a toll, and by June he was being laid up for days on end with stomach problems, headaches and heart symptoms. For the rest of his life, he was repeatedly incapacitated with episodes of stomach pains, vomiting, severe boils, palpitations, trembling and other symptoms, particularly during times of stress, such as attending meetings or making social visits. The cause of Darwin's illness remained unknown, and attempts at treatment had only ephemeral success.
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这种紧张造成了严重的后果，到6月份，他已经连续卧床数天，出现了胃病、头痛和心脏病症状。在他的余生中，他反复出现胃痛、呕吐、严重疖子、心悸、颤抖和其他症状，特别是在有压力的时候，比如参加会议或社交拜访。达尔文患病的原因尚不清楚，治疗的尝试也只是昙花一现。
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[[文件:Emma Darwin.jpg|缩略图|左|达尔文选择与他表姐艾玛·韦奇伍德Emma Wedgwood结婚。]]
    
[[William Whewell]] pushed Darwin to take on the duties of Secretary of the Geological Society. After initially declining the work, he accepted the post in March 1838.<ref>{{Harvnb|Desmond|Moore|1991|pp= 233–236}}.</ref> Despite the grind of writing and editing the ''Beagle'' reports, Darwin made remarkable progress on transmutation, taking every opportunity to question expert naturalists and, unconventionally, people with practical experience in [[selective breeding]] such as farmers and [[pigeon keeping|pigeon fanciers]].<ref name=JvW /><ref>{{Harvnb|Desmond|Moore|1991|pp= 241–244, 426}}</ref> Over time, his research drew on information from his relatives and children, the family butler, neighbours, colonists and former shipmates.<ref>{{Harvnb|Browne|1995|p=xii}}</ref> He included mankind in his speculations from the outset, and on seeing an [[orangutan]] in the zoo on 28 March 1838 noted its childlike behaviour.<ref>{{Harvnb|Desmond|Moore|1991|pp= 241–244}}</ref>
 
[[William Whewell]] pushed Darwin to take on the duties of Secretary of the Geological Society. After initially declining the work, he accepted the post in March 1838.<ref>{{Harvnb|Desmond|Moore|1991|pp= 233–236}}.</ref> Despite the grind of writing and editing the ''Beagle'' reports, Darwin made remarkable progress on transmutation, taking every opportunity to question expert naturalists and, unconventionally, people with practical experience in [[selective breeding]] such as farmers and [[pigeon keeping|pigeon fanciers]].<ref name=JvW /><ref>{{Harvnb|Desmond|Moore|1991|pp= 241–244, 426}}</ref> Over time, his research drew on information from his relatives and children, the family butler, neighbours, colonists and former shipmates.<ref>{{Harvnb|Browne|1995|p=xii}}</ref> He included mankind in his speculations from the outset, and on seeing an [[orangutan]] in the zoo on 28 March 1838 noted its childlike behaviour.<ref>{{Harvnb|Desmond|Moore|1991|pp= 241–244}}</ref>
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On 23 June, he took a break and went "geologising" in Scotland. He visited Glen Roy in glorious weather to see the parallel "roads" cut into the hillsides at three heights. He later published his view that these were marine raised beaches, but then had to accept that they were shorelines of a proglacial lake.
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William Whewell pushed Darwin to take on the duties of Secretary of the Geological Society. After initially declining the work, he accepted the post in March 1838.[87] Despite the grind of writing and editing the Beagle reports, Darwin made remarkable progress on transmutation, taking every opportunity to question expert naturalists and, unconventionally, people with practical experience in selective breeding such as farmers and pigeon fanciers.[13][88] Over time, his research drew on information from his relatives and children, the family butler, neighbours, colonists and former shipmates.[89] He included mankind in his speculations from the outset, and on seeing an orangutan in the zoo on 28 March 1838 noted its childlike behaviour.
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6月23日，他休息了一下，去苏格兰进行“地质考察”。他在一个风和日丽的日子里拜访了格伦 · 罗伊村，看到平行的“公路”在三个高度切入山坡。他后来发表了他的观点，认为这些是海洋抬升的海滩，但不得不接受它们是原冰川湖的海岸线。
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The strain took a toll, and by June he was being laid up for days on end with stomach problems, headaches and heart symptoms. For the rest of his life, he was repeatedly incapacitated with episodes of stomach pains, vomiting, severe [[boil]]s, palpitations, trembling and other symptoms, particularly during times of stress, such as attending meetings or making social visits. The cause of [[Charles Darwin's illness|Darwin's illness]] remained unknown, and attempts at treatment had only ephemeral success.<ref>{{Harvnb|Desmond|Moore|1991|pp= 252, 476, 531}}<br />{{harvnb|Darwin|1958|p=[http://darwin-online.org.uk/content/frameset?viewtype=text&itemID=F1497&pageseq=119 115]}}</ref>
 
The strain took a toll, and by June he was being laid up for days on end with stomach problems, headaches and heart symptoms. For the rest of his life, he was repeatedly incapacitated with episodes of stomach pains, vomiting, severe [[boil]]s, palpitations, trembling and other symptoms, particularly during times of stress, such as attending meetings or making social visits. The cause of [[Charles Darwin's illness|Darwin's illness]] remained unknown, and attempts at treatment had only ephemeral success.<ref>{{Harvnb|Desmond|Moore|1991|pp= 252, 476, 531}}<br />{{harvnb|Darwin|1958|p=[http://darwin-online.org.uk/content/frameset?viewtype=text&itemID=F1497&pageseq=119 115]}}</ref>
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Fully recuperated, he returned to Shrewsbury in July. Used to jotting down daily notes on animal breeding, he scrawled rambling thoughts about marriage, career and prospects on two scraps of paper, one with columns headed "Marry" and "Not Marry". Advantages under "Marry" included "constant companion and a friend in old age&nbsp;... better than a dog anyhow", against points such as "less money for books" and "terrible loss of time." Having decided in favour of marriage, he discussed it with his father, then went to visit his cousin Emma on 29 July. He did not get around to proposing, but against his father's advice he mentioned his ideas on transmutation.
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The strain took a toll, and by June he was being laid up for days on end with stomach problems, headaches and heart symptoms. For the rest of his life, he was repeatedly incapacitated with episodes of stomach pains, vomiting, severe boils, palpitations, trembling and other symptoms, particularly during times of stress, such as attending meetings or making social visits. The cause of Darwin's illness remained unknown, and attempts at treatment had only ephemeral success.
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在完全康复后，他于7月回到什鲁斯伯里。他习惯于草草记下动物饲养的日常笔记，在两张纸上潦草地写下关于婚姻、职业和前途的杂乱想法，其中一张写着“结婚”和“不结婚”。“玛丽”的优势包括“老年时有忠实的伴侣和朋友... ... 总之比养狗好” ，而不是“买书的钱少”和“时间的可怕损失”在决定结婚之后，他和父亲商量了一下，然后在7月29日去看望了他的表妹艾玛。他没有抽出时间来求婚，但他不顾父亲的劝告，提到了自己关于蜕变的想法。
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On 23 June, he took a break and went "geologising" in Scotland. He visited [[Glen Roy]] in glorious weather to see the parallel "roads" cut into the hillsides at three heights. He later published his view that these were marine [[raised beach]]es, but then had to accept that they were shorelines of a [[proglacial lake]].<ref>{{Harvnb|Desmond|Moore|1991|p= 254}}<br />{{Harvnb|Browne|1995|pp=377–378}}<br />{{Harvnb|Darwin|1958|p=[http://darwin-online.org.uk/content/frameset?viewtype=text&itemID=F1497&pageseq=86 84]}}</ref>
 
On 23 June, he took a break and went "geologising" in Scotland. He visited [[Glen Roy]] in glorious weather to see the parallel "roads" cut into the hillsides at three heights. He later published his view that these were marine [[raised beach]]es, but then had to accept that they were shorelines of a [[proglacial lake]].<ref>{{Harvnb|Desmond|Moore|1991|p= 254}}<br />{{Harvnb|Browne|1995|pp=377–378}}<br />{{Harvnb|Darwin|1958|p=[http://darwin-online.org.uk/content/frameset?viewtype=text&itemID=F1497&pageseq=86 84]}}</ref>
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On 23 June, he took a break and went "geologising" in Scotland. He visited Glen Roy in glorious weather to see the parallel "roads" cut into the hillsides at three heights. He later published his view that these were marine raised beaches, but then had to accept that they were shorelines of a proglacial lake.
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Continuing his research in London, Darwin's wide reading now included the sixth edition of Malthus's An Essay on the Principle of Population, and on 28 September 1838 he noted its assertion that human "population, when unchecked, goes on doubling itself every twenty five years, or increases in a geometrical ratio", a geometric progression so that population soon exceeds food supply in what is known as a Malthusian catastrophe. Darwin was well prepared to compare this to de Candolle's "warring of the species" of plants and the struggle for existence among wildlife, explaining how numbers of a species kept roughly stable. As species always breed beyond available resources, favourable variations would make organisms better at surviving and passing the variations on to their offspring, while unfavourable variations would be lost. He wrote that the "final cause of all this wedging, must be to sort out proper structure, & adapt it to changes", so that "One may say there is a force like a hundred thousand wedges trying force into every kind of adapted structure into the gaps of in the economy of nature, or rather forming gaps by thrusting out weaker ones." This would result in the formation of new species. As he later wrote in his Autobiography:
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1838年9月28日，他注意到这一论断，即人类的“人口，如果不加以控制，每25年就会翻一番，或者说以几何比例增加一倍” ，这是一个等比数列，因此人口很快就会超过食物供应，即所谓的马尔萨斯灾难。达尔文已经做好准备，将其与德 · 坎多勒的植物“物种战争”和野生动物之间的生存竞争相比较，解释了一个物种的数量是如何保持大致稳定的。由于物种总是在现有资源之外繁殖，有利的变异将使生物体更容易存活，并将变异传递给后代，而不利的变异将会消失。他写道，“所有这些楔形的最终原因，必须是理清适当的结构，并使其适应变化” ，因此，“有人可能会说，有一种力量，就像十万个楔形，试图强行进入每一种适应结构，进入自然经济的缺口，或者更确切地说，通过挤出较弱的缺口而形成缺口。”这将导致新物种的形成。正如他后来在《自传》中写道:
      
Fully recuperated, he returned to Shrewsbury in July. Used to jotting down daily notes on animal breeding, he scrawled rambling thoughts about marriage, career and prospects on two scraps of paper, one with columns headed ''"Marry"'' and ''"Not Marry"''. Advantages under "Marry" included "constant companion and a friend in old age&nbsp;... better than a dog anyhow", against points such as "less money for books" and "terrible loss of time."<ref>{{Harvnb|Darwin|1958|pp=[http://darwin-online.org.uk/content/frameset?itemID=F1497&viewtype=text&pageseq=238 232–233]}}</ref> Having decided in favour of marriage, he discussed it with his father, then went to visit his cousin Emma on 29 July. He did not get around to proposing, but against his father's advice he mentioned his ideas on transmutation.<ref>{{Harvnb|Desmond|Moore|1991|pp=256–259}}</ref>
 
Fully recuperated, he returned to Shrewsbury in July. Used to jotting down daily notes on animal breeding, he scrawled rambling thoughts about marriage, career and prospects on two scraps of paper, one with columns headed ''"Marry"'' and ''"Not Marry"''. Advantages under "Marry" included "constant companion and a friend in old age&nbsp;... better than a dog anyhow", against points such as "less money for books" and "terrible loss of time."<ref>{{Harvnb|Darwin|1958|pp=[http://darwin-online.org.uk/content/frameset?itemID=F1497&viewtype=text&pageseq=238 232–233]}}</ref> Having decided in favour of marriage, he discussed it with his father, then went to visit his cousin Emma on 29 July. He did not get around to proposing, but against his father's advice he mentioned his ideas on transmutation.<ref>{{Harvnb|Desmond|Moore|1991|pp=256–259}}</ref>
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Fully recuperated, he returned to Shrewsbury in July. Used to jotting down daily notes on animal breeding, he scrawled rambling thoughts about marriage, career and prospects on two scraps of paper, one with columns headed "Marry" and "Not Marry". Advantages under "Marry" included "constant companion and a friend in old age&nbsp;... better than a dog anyhow", against points such as "less money for books" and "terrible loss of time." Having decided in favour of marriage, he discussed it with his father, then went to visit his cousin Emma on 29 July. He did not get around to proposing, but against his father's advice he mentioned his ideas on transmutation.
    
===Malthus and natural selection===
 
===Malthus and natural selection===
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