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Upload PhotoEntry Name: Three promontory forts south of Trethias Island
Scheduled Date: 29 January 1975
Source: Historic England
Source ID: 1004234
English Heritage Legacy ID: CO 844
County: Cornwall
Civil Parish: St. Merryn
Traditional County: Cornwall
Lieutenancy Area (Ceremonial County): Cornwall
Church of England Parish: St Merryn
Church of England Diocese: Truro