First, Sharon and Gary Groves march to the beat of a military drum when they find themselves in charge of restoring their 1790 waterfront mansion. Next, an 1849 Greek Revival spins a thread of silken excitement and looming history for Marianne and Bruce Hamstra of Manchester, Conn. Then, it's a wild train ride west when Audrey Wenger and her family discover a turn-of-the-century diary exploring the life of a Montana railroad man in their 1901 Victorian home.