This quadrant is the earliest of a similar group of three other quadrants dated 1398, 1399 and circa 1400 respectively... Like the others, it is noteworthy for showing equal hours, in which the entire period from midnight to midnight is divided into twenty four equal parts. This technique had developed slowly during the 14th century. Indeed one of the earliest examples in England of an administrative record using equal hours occurs on the occasion of Richard II's abdication on 30 September 1399 stated to have been 'at about the ninth stroke of the clock'. On its reverse, the quadrant features...
