- profjoecain.net leonard-darwin-what-is-eugenics/Darwin was notable amongst Charles Darwin’s sons to be the only of them without an education in the natural sciences.
- posts24.ru Дарвин,_ЛеонардЛеонард Дарвин родился 15 января 1850 года.
- academickids.com encyclopedia/index.php/Leonard_…Leonard Darwin was born in 1850 in Down House in Kent.
- calendarz.com ru/on-this-day/january/15/leonard-…Леонард Дарвин , английский солдат, евгеник и политик (ум.
- researchers.cdu.edu.au en/publications/commentary…Leonard’s nearly fatal bout of scarlet fever in 1862 likely prevented Gregor Mendel from visiting Charles Darwin when Mendel was in Downe.
- prabook.com web/leonard.darwin/745339This book, "Municipal trade", by Leonard Darwin, is a replication of a book originally published before 1903.
- wikious.com en/Leonard_DarwinLeonard Darwin was born in 1850 at Down House, Kent, into the wealthy Darwin–Wedgwood family.
- worddisk.com wiki/Leonard_Darwin/Leonard Darwin was born in 1850 at Down House, Kent, into the wealthy Darwin–Wedgwood family.
- ras.ac.uk obituaries/Leonard/DarwinLeonard Darwin 1850-1943 The Royal Astronomical Society Fellow's obituary.
- http://wikilife.ru index.php…Первые годы жизни Леонарда прошли в Дауне, где жила семья Дарвинов.