It formed where the three rivers joined, between the island-guarded northern bank and southern cliffs, at the estuary the Celtic Iceni called “Noisy Mouth” (for the strident gulls that roosted there). The Romans helped.
They built a fort on the northern island, and on the cliffs to the south a receiving station for grain and wine. But more, they turned their ploughs loose on the soil. Disturbed, with every storm, silt filled the rivers. The rivers carried it down to the sea. And where it settled it formed a spit.
Plants moved in. The Romans went home. The Saxons used the grass-grown spit for summer grazing, and later invited the Vikings to trade.
One “Orme of the Orkneys” made of the northern island his second home and founded upon the former sandbank his entrepot. And so Great Yarmouth was born.
In 1086 seventy burgesses traded there.
Written for What Pegman Saw: Great Yarmouth, UK