The tower's cupola was damaged by an arson fire in 1984. It was reconstructed, and the tower's load-bearing exterior stonework – which Jervis designed in a mixture of Romanesque Revival and neo-Grec styles – was cleaned and restored in 1989–1990 by the William A. Hall Partnership. Christopher Gray has said of the tower's design that "Its rock-faced granite gives the tower a chunky, fortified appearance, as if it were a lookout for a much larger castle complex that was never built... The granite is competently handled, but the details are not very inspired or elegant. The tower is more picturesque than beautiful."