Christopher Johnston 1822–1891 Source: Wikimedia Commons About Christopher Johnston American professor of surgery (1822-1891) People from the Same Era Emanoil Bacaloglu 1830–1891 chemist, mathematician, physicist Bucharest Charles Murchison 1830–1879 physician Jamaica Henry Twells 1823–1900 hymnwriter Ashted Mikhail Fomich Petrushevsky 1832–1893 military personnel Russian Empire Boldizsár Horvát 1822–1898 poet, politician Szombathely Otto Christian Hammer 1822–1892 naval officer Hulerød