When President Fillmore signed the Fugitive Slave Bill[1] on September 18, 1850, he started a Negro migration that continued up to the opening of the Civil War, resulting in thousands of people of color crossing over into Canada and causing many thousands more to move from one State into another seeking safety from their pursuers. While the free Negro population of the North increased by nearly 30,000 in the decade after 1850, the gain was chiefly in three States, Ohio, Michigan and Illinois. Connecticut had fewer free people of color in 1860 than in 1850 and there were half a dozen other States that barely held their own during the period. The three States showing gains were those bordering on Canada where the runaway slave or the free man of color in danger could flee when threatened. It is estimated that from fifteen to twenty thousand Negroes entered Canada between 1850 and 1860, increasing the Negro population of the British provinces from about 40,000 to nearly 60,000. The greater part of the refugee population settled in the southwestern part of the present province of Ontario, chiefly in what now comprises the counties of Essex and Kent, bordering on the Detroit River and Lake St. Clair. This large migration of an alien race into a country more sparsely settled than any of the Northern States might have been expected to cause trouble, but records show that the Canadians received the refugees with kindness and gave them what help they could.[2] At the close of the Civil War many of the Negroes in exile returned, thus relieving the situation in Canada.