In celebration of Black History Month, the House of the Seven Gables is holding an exhibit on the Underground Railroad, the 19th century network of safe homes and routes that helped slaves fleeing to Northern free states. During those years, many residents of Salem and other area communities took part in the effort. Along with information about the Underground Railroad and the local contributions to it, the exhibit will follow the story of one slave on his journey from Washington, D.C., to a free state. The exhibit will run from Thursday through Feb. 28 at the Seamans Visitor Center at the House of the Seven Gables, 115 Derby St. It can be viewed during the house’s regular hours, daily from 10 a.m. to 5 p.m., except for Wednesdays when the museum is closed. Admission is $7 for adults, $3 for children, and free for members. A member preview reception is set for Wednesday from 5-7 p.m.