| 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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