"AN ISLAND WILL DRIFT AWAY"
"The ravens will starve" is likely referencing the ongoing breakup, public destruction, and exposure of high crimes committed by the British royal family.There is a legend that if the ravens at the tower of london are lost or fly away, the crown will go with it. These ravens are tended to by a "Ravenmaster" that feeds them aspecial diet and keeps their wings clipped so they can't fly away.
"A rock will stand on seven hills" seems to be referencing the vatican
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