Question: The castle that was the Seat of the Culdares line was owned by what person from the 1920s until the 1950s? 
Sentence (from "Hall, Lanteglos-by-Fowey"): The family of Mohun of Hall was also seated at Bodinnick ("alias" Bodinnoc, etc.) also in the parish of Lanteglos-by-Fowey and later at Boconnoc, both in Cornwall, and was one of the four co-heirs of Edward Courtenay, 1st Earl of Devon (1527–1556), feudal baron of Okehampton, etc., of Tiverton Castle, Okehampton Castle, etc., the last of the mediaeval Courtenay Earls of Devon.
Relevant evidence: No