Qui tunc Wallensi rex præerat manui.
Cepit Grithfridum regem vicitque Trehellum;
Sic micuit crebris militiæ titulis.
Attamen incaute Wallenses ausus adire,
Occidit æstivi principio Julii.
Prodidit Owenius, rex est gavisus Hovellus;
Facta vindicta monte sub Hormaheva.
Ense caput secuit Grithfridus, et in mare jecit,
Soma quidem reliquum possidet hunc loculum.”
The exploits of Robert fully entitled him to Orderic’s pet Greek word. “Colvenus” must be some corrupt form of Conwy.