William McKinley

McKinley was a president of the United States whose assassination the First Doctor witnessed. (PROSE: Byzantium!)
== Behind the scenes ==
McKinley's first name wasn't used in Byzantium!, but the common-sense interpretation of the passage, since the author is listing other completely real world historical events, is that the author intends the real-life President .
Category:US presidents from the real world
Category:19th century individuals
Category:20th century individuals