I'm fairly sure that Duloe isn't mentioned in Borlase's Antiquities. We have both editions at the Record Office so I can check next week, but I don't recall ever seeing it. I work at the RIC every Thursday and Friday, so may, if I've time tomorrow, be able to check the many Borlase manuscripts which are held there, as it's more likely to be mentioned in one of his parochial memoranda. By the way, there are 1976 facsimile reprints of Borlase available, mostly at auction, but even these can fetch up to £100 (I was recently outbid on one). The originals are generally £400-600 but may well realise less at auctions outside of Cornwall.