Sæfern is Brytene lengeste ēa. Hēo flīeƿþ 220 mīla þurh ƿesterne Brytene, þurh Muntgumniscīre, Scrobbesbyrigscīre, Ƿigreceastrescīre, and Glēaƿceasterscīre, þā brǣdaþ hēo and is sǣearm. Sēo sǣearm, Sæfernmūþa, is sǣ betƿeonum Norþƿēalum and Englum.

Sæfern
Land Geāned Cynerīce
Mūþ Bristol Channel
Lengu 354 kilometre
Med. ēagang 106.62±0.001 m³/s
Wætertroges mearc 11,420 km²
Logo Wikimedia Commons Sæfern Commons
Sæfern ēa fram Scrobbesbyrig castelle
Sæfernmūþa and his brycge