c.1859, English, signed to top limb 'Powell & Lealand 170 Euston Road, London', standing on typical ‘Powell & Lealand’ tripod with large trunnions supporting body, large plano-concave mirror on Powel single-sided support, fully mechanical stage with X-Y control with substage accessory mount, triangular bar with rack and pinion focusing, limb with struts supporting back of the body tube, fine focus wheel to rear of limb with date engraved below, with 16 accessories including: a camera lucida eyepiece, a complex substage achromatic condenser with integral stops and aperture, low power eyepiece, medium power eyepiece, high power eyepiece, dark wells, bar tool, live box, substage wheel of stops, pre-RMS threaded 1" objective and can, pre-RMS threaded ¼" objective and can, pre-RMS threaded ⅛" objective with correction collar and can, Leiberkuhn for the 1" objective, tweezers and large table bullseye with chamois leather cover for lens, all in fitted French polished mahogany cabinet, case height 41cm