Post Restante

Post Restante, department of a post-office where letters lie till they are called for.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Posse Comitatus * Potemkin
[wait for the fun]
Porto Rico
Portobello
Portsmouth
Portsmouth
Portugal
Poseidon
Posen
Posidonius
Positivism
Posse Comitatus
Post Restante
Potemkin
Potomac River
Potosi
Potsdam
Pott, August Friedrich
Potter, John
Potter, Paul
Potteries, The
Pot-wallopers
Pourparler