Complete the proverb: "A watched pot never..." what?

What is a warning or caution, or a formal legal notice to stop a proceeding? Which Scottish warrior king was born on July 11, 1274, probably in Ayrshire? A wartime adviser to de Gaulle, who was president of France from 1969 to 1974? Which watch brand was introduced in the 1950s with TV "torture test" ads? What is the water-filled barrier around a castle called? Which word names both a water spirit of German folklore and to put a stop to something? A water tower in Stanton, Iowa, a town of Swedish heritage, is painted to look like a giant what? The waterfall with the longest uninterrupted drop in the world, 3,212 feet, is on which continent?