This was, as we have already shown, the invariable expedient of Richelieu, who was aware that the prospect of the Queen-mother's return to France was not more repugnant to himself than the idea of retiring in disgrace and dishonour to her birthplace had ever been to his unhappy victim; and the proposal was accordingly repeated at every opportunity, because the minister was aware that it would never be accepted; while it afforded, from its apparent liberality, a pretext for casting the whole odium of her prolonged exile upon Marie de Medicis herself. In order to carry out the vast schemes of his ambition, the Cardinal had, at this period, reduced the monarch to a mere cypher in his own kingdom; but he could not, nevertheless, blind himself to the fact that Louis XIII, who was weak rather than wicked, had frequent scruples of conscience, and that during those moments of reflection and remorse he was easily influenced by those about him; while, whenever this occurred, he evinced a disposition to revolt against the ministerial authority which alarmed the Cardinal, and compelled him to be constantly upon his guard. After having throughout fifteen years successfully struggled against the spread of Calvinism, and that remnant of feudal anarchy which still lingered in France; humbled the House of Austria, his most dreaded rival; and, in order to aggrandize the state he served, sowed the seeds of revolution in every other European nation, and thus compelled their rulers to concentrate all their energies upon themselves, he was now constrained to descend to meaner measures, and to enact the spy upon his sovereign; lest in some unlucky moment the edifice, which it had cost him so mighty an amount of time and talent to erect, should be overthrown by a breath.