Witches' Sabbath (The Great He-Goat) powdered glass, orpiment and iron oxides. He likely worked with mixed materials. Technical analysis indicates that most of the Black Paintings begun with preparatory drawings. "Witches' Sabbath" is the exception; the final composition seems to have been painted directly onto the wall. Art historian Fred Licht notes that Goya's brushwork appears "clumsy, ponderous, and rough" and lacking finish compared to his earlier work. Licht believes this was a deliberate ploy to physically convey dismay at human inadequacy and his own feelings of personal doubt. Unique in the series, "Witches' Sabbath" was not significantly altered by Goya after his initial work.
The Duchess of Alba and la Beata she recoils and leans backwards, her eyes rolled in mock horror, her mouth curled in delight. Velazquez props herself up with a walking stick or cane, and bears a wooden cross in her extended right hand, playfully banishing the Duchess. Both figures wear white dresses; the duchess with black lace and bodice. The painting is composed of mainly white and black hues applied in broad brush strokes, while the dresses are outlined in touches of livid yellow. The figures are set against a flat, black background which isolates the moment and removes any context. "The Duchess of Alba and la