Letter from Rev. Ellis Davies, Cambrian Archaeological Association, Whitford Vicarage, Holywell to Ifor Williams In reading proof of his notes on the Mathry inscribed stone, it occurred to him to tell him that the personal name "Catica = Cadog" apppears in a place name near Denbigh viz. Melin Gadeg. Also, in Cornwall, there is a place name, Tregaddock 7/12/1937