Dollond of London, large 18th century brass library telescope, brass tube on a tripod base. Engraved 'Dollond London', 'Judge Cator, Athenaeum club S.W', and 'N.S.L Y3229'. English circa 1790. Height 58 cm, Tube length 109 cm, total length 138 cm, Objective lens diameter 8 cm, Eyepiece diameter 4 cm