Upnor was explaining phosphorus to three gaunt women with black patches glued all over their faces and necks: 'It is known, to students of the Art, that each metal is created when rays from a particular planet strike and penetrate the Earth, videlicet, the Sun's rays create gold; the Moon's, silver; Mercury's, quicksilver; Venus's, copper; Mars's, iron; Jupiter's, tin; and Saturn's lead. Mr. Root's discovery of a new elemental substance suggests there may be another planet – presumably of a green color – beyond the orbit of Saturn.'