Estimate: $450 - $800
.OCTANT MAKER: R WALSHAM, 170 PARK LANE, LIVERPOOL, 10-inch radius ebony frame and limb octant; ivory plaque to crossbar marked 'R. Walsham 170 Park Lane Liverpool'; ivory scale divided -4 to 100; brass index arm; ivory vernier divided 0-20; brass thumbscrew lock and adjustment screw; two pinhole sight vane (swivel shutter absent); shades (green; red; red); adjustment of the horizon glass (mirror absent) by lever; wing nut absent and milled clamping screws; crossbar pencil and one back strut absent. With stained pine case; lid absent. Provenance: The H.N.E Sheppard Estate Collection.