The Underground Railroad, a vast network of people who helped fugitive slaves escape to the North and to Canada, was not run by any single organization or person. Rather, it consisted of many individuals -- many whites but predominently black -- who knew only of the local efforts to aid fugitives and not of the overall operation. Still, it effectively moved hundreds of slaves northward each year -- according to one estimate, the South lost 100,000 slaves between 1810 and 1850.

An organized system to assist runaway slaves seems to have begun towards the end of the 18th century. In 1786 George Washington complained about how one of his runaway slaves was helped by a "society of Quakers, formed for such purposes." The system grew, and around 1831 it was dubbed "The Underground Railroad," after the then emerging steam railroads. The system even used terms used in railroading: the homes and businesses where fugitives would rest and eat were called "stations" and "depots" and were run by "stationmasters," those who contributed money or goods were "stockholders," and the "conductor" was responsible for moving fugitives from one station to the next.

For the slave, running away to the North was anything but easy. The first step was to escape from the slaveholder. For many slaves, this meant relying on his or her own resources. Sometimes a "conductor," posing as a slave, would enter a plantation and then guide the runaways northward. The fugitives would move at night. They would generally travel between 10 and 20 miles to the next station, where they would rest and eat, hiding in barns and other out-of-the-way places. While they waited, a message would be sent to the next station to alert its stationmaster.

The fugitives would also travel by train and