As to the Queen-mother, she was absorbed in watching the King; he during supper had made a display of high spirits, which she interpreted as assumed to cloak some plan against herself. Such sudden cheerfulness was in too strong a contrast to the fractious humor he had betrayed by his persistency in hunting, and by a frenzy of toil at his forge, where he wrought iron, for Catherine to be duped by it. Though she could not guess what statesman was lending himself to these schemes and plots--for Charles IX. could put his mother's spies off the scent--Catherine had no doubt that some plan against her was in the wind. The unexpected appearance of Tavannes, arriving at the same time as Strozzi, whom she had summoned, had greatly aroused her suspicions. By her power of organization Catherine was superior to the evolution of circumstances; but against sudden violence she was powerless. As many persons know nothing of the state of affairs, complicated by the multiplicity of parties which then racked France, each leader having his own interests in view, it is needful to devote a few words to describing the dangerous crisis in which the Queen-mother had become entangled. And as this will show Catherine de' Medici in a new light, it will carry us to the very core of this narrative. Two words will fully summarize this strange woman, so interesting to study, whose influence left such deep traces on France. These two words are dominion and astrology. Catherine de' Medici was excessively ambitious; she had no passion but for power. Superstitious and a fatalist, as many a man of superior mind has been, her only sincere belief was in the occult sciences. Without this twofold light, she must always remain misunderstood; and by giving the first place to her faith in astrology, a light will be thrown on the two philosophical figures of this Study. There was a man whom Catherine clung to more than to her children; this man was Cosmo Ruggieri. She gave him rooms in her Hôtel de Soissons; she had made him her chief counselor, instructing him to tell her if the stars ratified the advice and common-sense of her ordinary advisers. Certain curious antecedent facts justified the power which Ruggieri exerted over his mistress till her latest breath. One of the most learned men of the sixteenth century was beyond doubt the physician to Catherine's father, Lorenzo de' Medici, Duke of Urbino. This leech was known as Ruggiero the elder (_vecchio Ruggier_, and in French _Roger l'Ancien_, with authors who have written concerning alchemy), to distinguish him from his two sons, Lorenzo Ruggiero, called the Great by writers on the Cabala, and Cosmo Ruggiero, Catherine's astrologer, also known as _Roger_ by various French historians. French custom altered their name to Ruggieri, as it did Catherine's from Medici to Medicis.