premise: Florence MacLeod Harper was a Canadian journalist sent by U.S. newspaper "Frank Leslie's Illustrated Newspaper" as a staff reporter with an assignment to cover World War I on the Eastern front. She was an early female war correspondent and one of a handful of western journalists to leave a first-hand journalistic account of the early stages of the Russian revolution.
hypothesis: Harper left Russia before the Bolshevik Revolution.
reason: Harper left Russia in September 1917, while the Bolshevik Revolution began in November 1917.