There is a very good book on Ross and the attacks on Washington and Baltimore titled The Man Who Captured Washington: Major General Robert Ross and the War of 1812
. It was co-written by John McCavitt and Christopher T. George. McCavitt is from Ireland and George is a transplanted Brit living in Maryland.
Ross was actually considered a national hero in Britain after his successful attack on Washington, but he faded from memory as British historians ignored the small war with the U.S. in favor of writing on the war with France. The monument deteriorated from lack of care and vandalism, but was cleaned up for the bicentennial of the War of 1812.
They point out that during World War 2 there were United State troops stationed in the area of Rostrevor and give a funny claim from the time. They state: "According to oral tradition in the village, a passing U.S. Army tank took a potshot at the general's monument, though missing its target."
Here are two you tube videos covering Ross's monument.
Aerial view of monument
Commemorating writing of Star Spangled Banner