print. etching. 'Hetton Colliery in the County of Durham' / by Robson, Sunderland, c1823. three vignettes: perspective view of the works of the colliery, inclined and self-acting planes, with the locomotive and other engines, used on the rail way and the staiths and self discharging depot on the banks of the river Wear near Sunderland. description of work from 1820-1823, men who were employed on the project. annotated diagram: Section of the Pit and strata sunk through, scale below ground to 300 yards. overall: 43.3 x 55 cm, to platemark: 33 x 47.7 cm