In Wm Borlase’s Antiquities of the County of Cornwall, pub. 1769, the inscription is read thus:
CIRVSIVS HIC IACIT CUNOWORI FILIVS
The reading of the first name as DRVSTANVS seems to be generally accepted at present, with the initial letter(s) construed as a ‘D’ written back-to-front. I have never yet been able to find the evidence upon which such a reading is based: for example, other inscriptions from (around) the same period in which a ‘D’ is written back-to front. Do such examples exist? If so, where?