harriet tubman ten year span
Harriet Tubman is perhaps the most well-known of all the Underground Railroad's conductors.. During a ten-year span she made 19 trips into the South and escorted over 300 slaves to freedom. Tubman was born a slave in Maryland's Dorchester County around 1820. At age five or six, she began to work as a house servant. Seven years later she was sent to work in the fields.