Unloading Pit Props at Coalbrookdale; Thomas Hearne; 1744-1817; British; after 1790; Graphite and gray wash on medium; slightly textured; cream wove paper; Sheet: 8 1/2 x 7 1/2 inches (21.6 x 19.1 cm); carts; coal; coal mine; coal pits; genre subject; horses (animals); labor; loading; logs; men; mine; pit props (coal mining); props; resting; smoke; trees; unloading; wagons; working; Coalbrookdale; England; Europe; Shropshire; United Kingdom