Above the plaque is a recess filled with a relief in white limestone or marble showing the coronet, two crests (dragon and sword arm), and the motto of the marquesses of Londonderry. The relief is deeply undercut under the coronet and behind the dragon's wing. The coronet is decorated with three leaves and two balls as befits a marquess. The dragon crest represents the Stewart family. The arm (more precisely "cubit") with the hand in a gauntlet holding a sword represents the Vane family. The scroll below the coronet and the crests shows the motto (in Latin), which reads: METUENDA COROLLA DRACONIS (the dragon's crest is to be feared).