> Rocks heated in the open fire were also used to heat bath
> water. These weren't called "brotha" (pl. of "bruth") however,
> but rather prosaicly "clocha fothraicthe" (DIL C 248.32-6).
What a shame! I suppose this still leaves the possibility that 'bruth'
refers to the state of the contents of the cup - 'a boiling-over thing'.