english: What happened was that Aveling's mistress was Marx's daughter, and when both Darwin and Marx were dead, Marx's papers became muddled up with Aveling's papers, and a letter from Darwin saying, "My dear sir, thank you very much but I don't want you to dedicate your book to me," was mistakenly supposed to be addressed to Marx, and that gave rise to this whole myth, which you've probably heard.
non_english: Desilo se to da je Marksova ćerka bila sa Ejvelingom, i da su se nakon Darvinove i Marksove smrti izmešali Ejvelingovi i Marksovi Papiri, uključujući i Darvinovo pismo u kome je pisalo: "Dragi moj gospodine, hvala Vam mnogo, ali ja ne želim da svoju knjigu posvetite meni." Otud pogrešna pretpostavka da je pismo bilo upućeno Marksu, što je preraslo u taj mit, koji ste verovatno već čuli.