An early 19th century ebony octant, the A frame with inset ivory plaque signed Lilley - London, brass index arm, ivory main scale reading 3-0-100, ivory vernier, two horizon mirrors, for both front and back horizons, three shades, peep-hole sights, in shaped case with fine trade label of John Lilley, West India Docks, London -- box: 12¼in.(31cm) radius