the QUOTE - just to answer off the point probably like most of your family......
tho the heavens fall is
fiat justicia caedunt coela
let justice be done tho the heavens fall - is R v Wilkes 1762
The house of commons has got irritated that WIlkes was returned as member for middlesex and is in Lord Mansfield's judgement
He finds against Wilkes and says it in his judgement when a crowd is demonstrating outside wanting him to find FOR Wilkes
and the fearless Lord Chief Justice says no no I must find for the govt.... fiat justicia.... etc
he is reusing a phrase - see the wiki entry