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
Enlightenment in Spain such as La Condamine and Alexander von Humboldt, to its overseas empire, usually closed to foreigners. There were extended Royal Botanical Expeditions to Chile and Peru (1777–88), New Granada (1783–1816), and New Spain (1787–1803), which produced a huge number of detailed botanical drawings and specimens destined for the Royal Botanical Garden and the Royal Natural History Cabinet in Madrid. The Malaspina Expedition was an important scientific expedition headed by Spanish naval commander Alejandro Malaspina over five years (1789–94), with naturalists and botanical illustrators gathering information for the Spanish crown. The illustrators on the voyage included José de Pozo, trained at