Beda Venerabilis, C.730 AD Historia Ecclesiastica gentis Anglorum.III.3:
Qui videlicet locus accedente ac recedente reumate, bis cotidie instar insulae maris circumluitur undis, bis renudato littore contiguus terrae redditur.
This same place, each and every day as the tide ebbs and goes, is twice surrounded and washed like an island by the sea waves, as is twice, its shores dried, rendered back contiguous with land.