English Quadrant c1850 with ebony frame and ivory name plate for R. Moffatt. Brooks Ludgate St, London engraved on brass index arm. Ivory scale -5' to 100' by 1?. Ivory vernier with tangent screw. Index mirror with three filters. Horizon glass, sight vane double peep with pivoted cover. Stepped oak keystone box with paper label Alfred Brooks from Dolland's 41 Ludgate Street. Brooks is listed in 'Directory of British Scientific Instrument Makers 1550-1851' by Gloria Clifton