When Mary Stuart came to Scotland the country had just become Protestant. She did not interfere with the settlement, but refused to permit the suppression of Catholicism, and became, in opposition to the most violent of the reformers, a champion of religious toleration. John Knox differed from all the Protestant founders in his desire that the Catholics should be exterminated, root and branch, either by the ministry of State, or by the self-help of all Christian men. Calvin, in his letter to Somerset, went very far in the same direction, but not so far as this. The nobles, or rather the heads of clans, in whom the power of society resided, having secured the Church lands, were not so zealous as their preachers, and the queen succeeded in detaching them. Mary was religious without ferocity, and did not share the passions of her time. She would have been willing to marry Leicester, and to make herself dependent on English policy, but Elizabeth refused to acknowledge her right of succession, and drove her to seek connection with the Catholic Powers. She wished at one time to marry Don Carlos, that, having been Queen of France, she might become Queen of Spain. This was impossible; and so she became the wife of Darnley, who united the blood of the Tudors and the Stuarts. She belonged, on her mother's side, to the house of Guise, whose princes were leaders of the militant Counter-Reformation. The duke, who had slaughtered the Huguenots at Vassy, was now dead. But his brother, the Cardinal, who afterwards claimed the merit of a more signal massacre, was still an important personage in Church and State. Mary, appearing on this background of sanguinary uncles, was believed to be an adherent of their policy, and to take part in all extremes of the Catholic reaction. Riccio, the Piedmontese secretary, through whom she corresponded with foreign princes, was hated accordingly; and Darnley, who attributed to the Italian's influence his own exclusion from power, consented that he should be made away with. The accomplices who wrought the deed took care that Mary should know that they acted with his approval; and when she found herself the wife of an assassin and a coward, the breach ensued which was sometimes dissembled but never repaired. Three months later their son was born, but Darnley was not present at the christening. His enemies advised the Queen to obtain a divorce, but she objected that it would injure the prospects of her son. Maitland then hinted that there might be other ways of getting rid of him. Mary did not yield consent; but the idea once started was followed up, and the king was doomed to death by what was called the Bond of Craigmillar.