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: Kar se je zgodilo, je, da je bila  Avelingova ljubica Marxova hči, in ko sta bila Darwin in Marx oba mrtva, so se Marxovi papirji pomešali z Avelingovimi in Darwinovo pismo z besedami:  "Moj dragi gospod, najlepša hvala ampak nočem, da mi posvetite knjigo," naj bi bilo zmotno namenjeno Marxu in je začelo ta mit,  ki ste ga najbrž že slišali.