He was born on December 8, 1856 in Baltimore, the son of the physician Christopher Johnston (1822-1891), a professor of surgery at the University of Maryland and the discoverer of Johnston's organ, and Sarah Lucretia Clay (1835-1879).
Tyson took the dinosaur teeth to a local doctor named Christopher Johnston.
Christopher Columbus | Christopher Walken | Christopher Lee | Christopher Wren | Christopher Plummer | Christopher Reeve | Christopher Lloyd | Christopher Lambert | Christopher Kasparek | Christopher Hogwood | Christopher Marlowe | Christopher Hitchens | Joseph E. Johnston | Christopher Guest | Christopher | Daniel Johnston | Christopher Tolkien | Christopher Isherwood | Ben Johnston | John Christopher | Christopher Fry | Christopher Alexander | Albert Sidney Johnston | Christopher Kane | Christopher Hatton | Christopher Banks | Dennis Christopher | Christopher Wordsworth | Christopher Larkin | Christopher Cockerell |