A Late 18th-Early 19th century Ebony and Brass Lacquered Octant with inlaid ivory makers plate stamped B Wood, Liverpool, pinhole sight with flap, six coloured shades and mirrors, the horizon mirror on an adjustable turntable rotated by two knobs, the index arm with vernier tangent screw and clamp, the arc with an ivory scale, radius 25 cm, in shaped mahogany case with 'H. G. Blair & Co. Cardiff.