Unknown subject (Let Him look up into the Heaven and laugh in the bright air). Dated: possibly c. 1805. Dimensions: plate: 16.2 x 9.5 cm (6 3/8 x 3 3/4 in.) sheet: 17.5 x 10.5 cm (6 7/8 x 4 1/8 in.). Medium: engraving and relief-etching (with some aq