János Pettkó 1812–1890 Source: Wikimedia Commons About János Pettkó Hungarian (Slovakian) geologist and palaeontologist (1812-1890) People from the Same Era Emma Fürstenhoff 1802–1871 artist Stockholm Henry Courtney Selous 1803–1890 painter Deptford Sarah Harris Fayerweather 1812–1878 abolitionist, activist Norwich Emil Remigius Frey 1803–1889 politician Basel Don Carlos Buell 1818–1898 military personnel Lowell Andrew Leete Stone 1815–1892