below) William Alvey Darwin, 1767 (survived 19 days) He then had an extra-marital affair with a Miss Parker, producing two daughters: Susanna Parker (1772–1856) Mary Parker (1774–1859) He then became smitten with Elizabeth Collier Sacheveral-Pole, who was married to Colonel Sacheveral-Pole and was the natural daughter of the Charles Colyear, 2nd Earl of Portmore. Sacheveral-Pole died soon afterwards, and Erasmus married Elizabeth and they bore an additional seven children: Edward Darwin (1782–1829) Frances Anne Violetta Darwin (1783–1874); married Samuel Tertius Galton; mother of Francis Galton (see below) Emma Georgina Elizabeth Darwin (born 1784) Sir Francis Sacheverel Darwin (1786–1859) John Darwin (1787–1865) Henry Darwin (born 1789) Harriot Darwin (1790–1825); later Harriott Maling. Samuel John Galton Samuel "John" Galton FRS (1753–1832) was an arms manufacturer from Birmingham. He married Lucy Barclay (1757–1817), daughter of Robert Barclay Allardice, MP, 5th of Urie. They had the eight children: Mary Anne Galton (1778–1856), married Lambert Schimmelpenninck in 1806 Sophia Galton (1782–1863) married Charles Brewin in 1833 Samuel Tertius Galton (1783–1844) (whose son Francis Galton was also notable). Theodore Galton (1784–1810) Adele Galton (1784–1869) married John Kaye Booth, d.s.p. Hubert John Barclay Galton (1789–1864). Ewen Cameron Galton (1791–1800), died aged 9. John Howard Galton (1794–1862), father of Douglas Strutt Galton. The second generation Robert Darwin (1766–1848) The son of Erasmus Darwin, Robert Darwin was a noted physician from Shrewsbury, whose own income as a physician, together with astute investment of his inherited wealth, enabled him to fund his son Charles Darwin's place on the Voyage of the Beagle and then gave him the private income needed to support Charles' chosen vocation in natural history that led to the inception of Darwin's theory of evolution. He married Susannah Wedgwood, daughter of Josiah Wedgwood (see above), and they had the following children. Marianne Darwin (1798 – 18 July 1858), married Henry Parker (1788–1858) in 1824. Caroline Sarah Darwin (1800–1888), married Josiah Wedgwood (grandson of the first Josiah Wedgwood) Susan Elizabeth Darwin (1803–1866) Erasmus Alvey Darwin (1804–1881) Charles Robert Darwin (1809–1882) (see below) Emily Catherine Darwin (1810–1866), was Charles Langton's second wife. Josiah Wedgwood Josiah Wedgwood (1769–1843) was the son of the first Josiah Wedgwood, and Member of Parliament for Stoke-on-Trent. He married Elizabeth Allen (1764–1846) and they had nine children: Sarah Elizabeth Wedgwood (1793–1880). Josiah Wedgwood (1795–1880) married Caroline Darwin, daughter of Robert Darwin and Susannah Wedgwood. They are grandparents of composer Ralph Vaughan Williams. Mary Ann Wedgwood