E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
The plaster of which the court ladies made their patches. These patches, worn on the face, were cut into the shape of crescents, stars, circles, diamonds, hearts, crosses; and some even went so far as to patch their face with a coach-and-four, a ship in full sail, a château, etc. This ridiculous fashion was in vogue in the reign of Charles I.; and in the reign of Anne was employed as the badge of political partisanship. (See PATCHES.)
Your black patches you wear variously,
Some cut like stars, some in half-moons, some lozenges.