Brass sextant with silver scale, signed (see inscription), in a red leather box. Made in the early 19th Century and used by Robert Wilson in his Eastern travels, 1820-23. Inscription: engraved just below the scale Schmalcalder 82 Strand London

Pocket brass sextant, index arm operated by a toothed quadrant and pinion, in wooden box. Used by Robert Wilson in his Eastern travels, 1820-23. Inscription: Dollond, London