It had been so used when George III was king; and a picture of the Marquis of Gaunt is still extant, with his hair in powder and a pink ribbon, in a Roman shape, as it was called, enacting the part of Cato in Mr. Addison's tragedy of that name, performed before their Royal Highnesses the Prince of Wales, the Bishop of Osnaburgh, and Prince William Henry, then children like the actor. 
It had been so used when George III was king; and