There was no Wales/England border; more to the point, Great Britain was still attached to mainland Europe, before sea levels rose and we became an island nation.
Nid oedd ffin rhwng Cymru a Lloegr; yn fwy perthnasol byth, roedd Prydain Fawr yn dal ynghlwm wrth dir mawr Ewrop, cyn i lefel y môr godi a’n gwneud ni’n ynys o genedl.