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It would be about 10 Years, here is the excerpts and the site:

With the assistance of Still, and other members of the Philadelphia Anti-Slavery Society, she learned about the workings of the Underground Railroad (click for details). In 1850, Harriet helped her first slaves escape to the North. She sent a message to her sister's oldest son that said for her sister and family to board a fishing boat in Cambridge. This boat would sail up the Chesapeake Bay where they would meet Harriet in Bodkin's Point. When they got to Bodkin's Point, Harriet guided them from safehouse to safehouse in Pennsylvania (which was a free state) until they reached Philadelphia. Harriet Tubman's career in the Railroad was ending by December 1860. She made her last rescue trip to Maryland, bringing seven people to Canada. In the ten years she worked as a "conductor" on the Railroad, Harriet managed to rescue over 300 people. She had made 19 trips and never lost a passenger on the way. For Tubman's safety, her friends took her to Canada.

* http://www.math.buffalo.edu/~sww/0history/hwny-tubman.html

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17y ago

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