Premise: Blythburgh is a village and civil parish in the Suffolk Coastal district of the English county of Suffolk. It is 4 mi west of Southwold and 5 mi south-east of Halesworth and lies on the River Blyth. The A12 road runs through the village which is split either side of the road. At the 2011 census the population of the parish was 297. The parish includes the hamlets of Bulcamp and Hinton.
Hypothesis: Blythburgh lies on the River Blyth.