The toughest history quiz to be found online returns for another month. Click anywhere in the box above to begin.

This month we have questions on the Italian secret police force, Britain's first settlement in the West Indies and 18th-century maritime lore. There's a clue to one of the questions in the background image.

There are no prizes for getting them all right, just the respect and admiration of your peers. Let us know how you get on in the comments below, on Twitter, or on Facebook.

- Previous quizzes