Source: https://hakaimagazine.com/news/memories-of-the-end-of-the-last-ice-age-from-those-who-were-there/
The island of Jersey, northwest of France, where he heard the old story. Locals told the 19th-century Scottish travel writer how, in a bygone age, their island was much more substantial and that folks used to walk to the French coast. The only hurdle to their journey was a river quickly crossed using a short bridge.
Nunn has since gathered 32 groups of stories from indigenous communities around the coast of Australia—a continent nearly as large as Europe—that seem to refer to geological changes along shorelines.
These stories are anecdotes, but enough accounts make for data.
Meltwater pulses cause sudden and extreme sea level rise.
See also Doggerland, the landmass that connected the British Isles to mainland Europe.