Cashels aired and ventilated

• castles in the air: imaginary or unrealistic plans

• AngI cashel: castle, ring fort, stone fort

• I caiseal: castle

• Cashel: a town in Co. Tipperary; formerly the royal seat of the kings of Munster
  • A Finnegans Wake Gazetteer

• clashes: anagram of cashels → 004.01

• aired and ventilated: opinions are aired and ventilated in Parliament

• heard

• vented: to utter, to publish (archaic)

• ventilate: to shoot with a gun; (of a bullet) to make a hole