During the Civil War, two of Mosby�s Rangers, an independent Confederate Calvary unit, are said to have been hanged on the site of Killahevlin. This site's vantage point proved to be a strategic location for Union troop encampment.
Killahevlin was placed on the National Register of Historic Places and the Virginia Landmarks Register in 1993.
William Edward Carson, an Irish immigrant and limestone baron, built Killahevlin on one of the highest spots in Front Royal, Virginia. Mr. Carson chose the Gaelic name of Killahevlin because of his fond memories of Killyhevlin in Northern Ireland where he spent many happy hours playing with a childhood friend.
Mr. Carson came to American in 1885 at the age of 15. Will became a prominent figure in local, state, and national politics. He was referred to by Senator Harry Byrd, Sr. as one of the most outstanding figures in the state.
Will Carson, the first chairman of the Virginia Conservation and Development Commission and acknowledged as one of Virginia�s primary historians, emphasized Virginia's historically rich heritage. He is credited with the creation of the Skyline Drive, as well as the development of historic Jamestown, Williamsburg and the Yorktown Colonial National Monument. The historical markers placed throughout Virginia are also attributed to Mr. Carson.
Killahevlin was designed by the Washington D.C. architectural firm of A. B. Mullet & Co. whose founder designed the Old Executive Office Building in Washington, D.C.