Nothing to fear but ignorance June....
I can answer the question above ... but the sun is shining and the day is still tapping on the window.
Here goes anyway (from the visitors guide to Caldey)
There is some disagreement about the Latin text. Rhys believed it to be 9th century and read it as ET SINGNO CRUCIS IN ILLAM FINGSI ROGO OMNIBUS AMMULANTIBUS IBI EXORENT PRO ANIMA CATUOCONI "and I have provided it with a cross: I ask all who walk in this place to pray for the soul of Cadwgan". Another expert, Professor Burkitt, read the opening words as SIHGNO CRUCIS IH (U) ILTUTUTI FINGSI "with the sign of the cross, I, Illtyd, have fashioned (this monument)". This interpretation would date the Latin text to the time of St Illtyd, who died in around 535.