I'm assumin' you've had no joy with the research on this so far, Mr H...
I must admit I've not had time to look into it further, although the same book does go on, only a couple of pages later, to talk about The Hurlers!
I never knew the rules for Hurling, and assumed it to be an entirely different game altogether. And as an aside, I'm happy to report that St Ives annual Hurling Day starts with the blessing of the ball in the holy well of St Ia! :)
G x