sentences:  In 1884 Townsend began building a baronial estate in the Catoctin Mountains called "Gapland," near Burkittsville, Maryland.Gapland was built on the site of the Battle of Crampton's Gap, and is in close proximity to the battlefields of South Mountain and Antietam.The estate was composed of several buildings, including Gapland Hall, Gapland Lodge, the Den and Library Building, and a mausoleum (notable for its inscription of "Good Night Gath").