MIs for this parish are included in the Devon FHS index - see under Cemeteries on the main Devon page.
A transcription of the Memorial Inscriptions for the Church of St Mary, Tedburn, is held in the Society of Genealogist's Library, in Vol. 2 of Devon Memorial inscriptions, DE/M15.
Cresswell, B.F. Notes on the Churches of the Deanery of Kenn, Devon, (1912). [Extracts]
You can see maps centred on OS grid reference SX816942 (Lat/Lon: 50.735309, -3.679176), Tedburn St Mary which are provided by: