Castor and Pollux are known as the twin sons of which god?

Castle Clinton in New York City was originally a fort, renamed in 1815 for which mayor? The British royal family's surname, adopted in 1917, comes from which castle? "Castle Richmond" (1860) is a novel by which author of "Barchester Towers"? Castles offered great protection until the 1400s, when which weapons came into wide use? Which children's author was born on March 2, 1904, a date now celebrated as Read Across America Day? Who wrote the play "Cat on a Hot Tin Roof"? What is the name of the portly patriarch in "Cat on a Hot Tin Roof"? In a 1971 Top 40 hit, Cat Stevens sings of being followed by what?