They can emphasize a word or phrase or denote a character's thoughts.
They wanted to control all of the silver from the Americas, and that was the only way Europe was able to trade with China, which didn’t need any other goods from Europe
The English Middle Ages is a historical period that started in the V century and ended in the XVI century. Historically it begins with the departure of the Roman legions from Britain and the invasion of the Anglo-Saxons and ends with Henry VIII and the reform of the Scottish theologian, John Knox