I have a facsimile copy of Naenia Cornubiae; (the cromlechs and tumuli of Cornwall) by Borlase. I got it in a bookshop in Padstow. It was put out by Llanerch press but looks like they may not have any left http://www.llanerchpress.com/index.php?file=book&cat=17&id=189785336X

Phil