Pocket sextant made by John Dollond, London, about 1800. Lacquered brass frame and limb, a hinged wooden handle. Signed on the index arm: Dollond London. Polished brass scale from -2° to 154°

every 30', measuring to 126° (digits read from the pivot). Brass vernier to 1', zero at the left. There is no tangent screw; the clamping screw is on the back of the index arm. Two shades (red and green). Index- and horizon-glass adjustment by screws. Magnifier (single lens) on a 48 mm swivelling arm. Sight vane with one pinhole and a swivelling shade (missing). A fitted square mahogany box.