Palmerston, the Foreign Office’s much-loved mascot and chief mouser, is returning to Whitehall after a four-month purr-dah brought on by stress. The black-and-white rescue cat arrived at the FCO ...

LONDON — When Palmerston, the U.K. Foreign Office’s “chief mouser,” vanished from public view earlier this year, some became concerned about the black-and-white rescue cat's whereabouts.