Penelope McElwee, The non-representation of the agricultural labourers in 18th and 19th century English paintings : an exploration into the artistic conventions followed by the aristocracy and landowning classes in representations of the agricultural labourers ..., Newcastle upon Tyne, 2016, pp. 128-29, fig. 10-2, NX650.L32 M34 2016 (YCBA)