When Mary was about fifteen years of age, the King of France began to think that it was time for her to be married. It is true that she was still very young, but there were strong reasons for having the marriage take place at the earliest possible period, for fear that something might occur to prevent its consummation at all. In fact, there were very strong parties opposed to it altogether. The whole Protestant interest in Scotland were opposed to it, and were continually contriving plans to defeat it. They thought that if Mary married a French prince, who was, of course, a Catholic, she would become wedded to the Catholic interest hopelessly and forever. This made them feel a most bitter and determined opposition to the plan. In fact, so bitter and relentless were the animosities that grew out of this question, that an attempt was actually made to poison Mary. The man who committed this crime was an archer in the king's guard: he was a Scotch man, and his name was Stewart. His attempt was discovered in time to prevent the accomplishment of his purpose. He was tried and condemned. They made every effort to induce him to explain the reason which led him to such an act, or, if he was employed by others, to reveal their names; but he would reveal nothing. He was executed for his crime, leaving mankind to conjecture that his motive, or that of the persons who instigated him to the deed, was a desperate determination to save Scotland, at all hazards, from falling under the influence of papal power. Mary's mother, the queen dowager of Scotland, was of a celebrated French family, called the family of Guise. She is often, herself, called in history, Mary of Guise. There were other great families in France who were very jealous of the Guises, and envious of their influence and power. They opposed Queen Mary's marriage to the dauphin, and were ready to do all in their power to thwart and defeat it. Queen Catharine, too, who seemed to feel a greater and greater degree of envy and jealousy against Mary as she saw her increasing in grace, beauty, and influence with her advancing years, was supposed to be averse to the marriage. Mary was, in some sense, her rival, and she could not bear to have her become the wife of her son.