| Code | NA1688 |
| Place Entry | FRISMARSH/FRISMARSH/SUNK ISLAND/SUNK ISLAND/YORKSHIRE EAST RIDING |
| Place Name | FRISMARSH |
| Area2 | FRISMARSH |
| Area3 | SUNK ISLAND |
| Area4 | SUNK ISLAND |
| Area5 | YORKSHIRE EAST RIDING |
| Notes | Frismarsh was a town on the site of the later Sunk Island; it was washed away by the sea in the period 1286-1310 |
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