Gateway to Freedom —— The Hidden History of America's Fugitive Slaves

----- 通往自由之路: 美国逃亡奴隶隐史

ISBN: 9780198737902 出版年：2015 页码：320 Foner, Eric Oxford University Press

The story of how three remarkable New Yorkers helped over 3000 African American slaves escape to a life of liberty in Canada, in the decades before the American Civil War