of his 17 children. After his graduation from Cambridge during 1829, Fox was appointed as the Vicar of Osmaston and during 1838 became the Rector of Delamere, a living he retained until his retirement during 1873. The fourth generation George Howard Darwin George Howard Darwin (1845–1912) was an astronomer and mathematician. He married Martha (Maud) du Puy of Philadelphia. They had five children: Charles Galton Darwin (see below). William Robert Darwin (married Sarah Monica Slingsby). Gwendoline "Gwen" Darwin, artist; (see below). Leonard Darwin 1899. Margaret Elizabeth Darwin (married Sir Geoffrey Keynes, bibliophile) (see below). Francis Darwin Francis Darwin (1848–1925) was the botanist son of Charles Darwin and Emma Darwin (née Wedgwood). Francis Darwin married Amy Ruck during 1874, who died during 1876 after the birth of their son Bernard Darwin, an author on golf – see below. Francis married Ellen Crofts during September 1883 and they had a daughter Frances Crofts, who married and became known as the poet Frances Cornford (see below). During 1913 he married his third wife Florence Henrietta Darwin (née Fisher); there were no children of this marriage, but he became step-father to Fredegond Shove née Maitland and Ermengard Maitland. He is buried at the Parish of the Ascension Burial Ground in Cambridge, where he is interred in the same grave as his daughter Frances Cornford. His third wife and his brother Sir Horace Darwin and his wife Lady 'Ida' are interred in the same graveyard, as well as his step-daughter Fredegond Shove but not her sister Ermengard Maitland. Leonard Darwin Leonard Darwin (1850–1943) was variously an army officer, Member of Parliament and eugenicist who corresponded with Ronald Fisher, thus being the link between the two great evolutionary biologists. Horace Darwin Horace Darwin (1851–1928) and Ida Darwin (1854–1946) had the following children: Nora Darwin, married Sir Alan Barlow (see below). Ruth Darwin. Erasmus Darwin. He is buried at the Parish of the Ascension Burial Ground in Cambridge, with his wife. His brother Sir Francis Darwin is interred in the same graveyard. The fifth generation Charles Galton Darwin Charles Galton Darwin 1887–1962 was the son of George Howard Darwin (see above) and was a noted physicist of the age, and Director of the National Physics Laboratory. His son George Pember Darwin (1928–2001) married Angela Huxley, great-granddaughter of Thomas Huxley. Gwen Raverat (née Darwin) Gwen Raverat (1885–1957) was the daughter of George Howard Darwin and was an artist.