The original estate was 500 acres ( 2.0 km ) called Catton .
The original estate was patented from the first proprietors of the Maryland Colony , the Calvert family , on August 26 , 1681 by Robert Carvile of St. Mary 's City , Maryland .
The original estate was 500 acres ( 2.0 km ) called Catton and was patented from the first proprietors of the Maryland Colony , the Calvert family , on August 26 , 1681 by Robert Carvile of St. Mary 's City , Maryland .