Witches' Sabbath (The Great He-Goat) whose full-length portrait appears in the same series. As with the other "Black Paintings", Goya began with a black background which he painted over with lighter pigments, then with broad, heavy brushstrokes of grey, blue and brown. The darker areas were achieved by leaving the black under-paint exposed; this is most obvious in the figure of the Devil. Like the other works in the series, "Witches' Sabbath" is worked up through heavy, slashing brushstrokes. The plaster was underlaid with thick carbon black before the paint was applied in hues of white lead, Prussian blue, vermilion of mercury, and crystals of
James Roberts (painter) was the reason her father agreed to sit for Roberts, that the result was uncharacteristic, and that the book shown was a novel. Roberts was also a scene painter at Blenheim Palace, in 1788 and 1789. In 1789 he was designer for "The Maid of the Oaks", and "False Appearances". a translation by Henry Seymour Conway of "Trompeurs Dehors" by Louis de Boissy. By 1795, Roberts had an appointment as portrait painter to the Duke of Clarence. He exhibited again annually at the Royal Academy from 1795 to 1799. The National Portrait Gallery, London holds 52 portraits by Roberts or