First, in Adamstown, Md., Vicki and Pete Michael knew they had a historic home but when they found that their farmhouse was once a safe house on the Underground Railroad, more historical stories came to life. Next, Shelly and Steve Posey found so much history in their six-room upstairs apartment that Shelly became entrenched in the life of its former tenant, a hero from World War II. Then, Connie and Jeff Kelsey found an attic full of finds in Snohomish, Wash. Finally, Barb and Darrel Swanson of Carver, Minn., found ties to the original owners of their home, including antiques, an 1890 painting and family stories.