The pigs from eastern England, mainly Essex, were influenced by importations from China in the late 18th century, while those from Devon and Cornwall were probably more closely related to the pigs in mainland Europe, particularly France.
Svinene fra East Anglia, primært Essex, var under stærk indflydelse fra svin importeret fra Kina i slutningen af det 18. århundrede, mens svinene fra Devon og Cornwall sandsynligvis var tættere beslægtede med fastlandets svin, især de franske.