A Derby biscuit porcelain group, 'Astronomy and Geometry', circa 1790-1800, model 43, star mark of 'Repairer' (modeller) Isaac Farnsworth, after Meissen's arts and Sciences models by Acier about 1765 and depicting two putti, one with a telescope, the other taking measurements beside a globe; see P. Bradshaw, 'Derby Porcelain Figures 1750-1848', plate 151, height 16 cm