John Milton wrote four divorce tracts in 1643–1645 that argued for the legitimacy of divorce on grounds of spousal incompatibility. His ideas were ahead of their time; arguing for divorce at all, let alone a version of no-fault divorce, was extremely controversial and religious figures sought to ban his tracts. In 1670 a precedent was first set with an Act of Parliament allowing Lord John Manners to divorce his wife, Lady Anne Pierrepont, and until the passage of the Matrimonial Causes Act 1857, divorce could only be obtained through a specific Act of Parliament. The move towards secularisation and liberalisation was reinforced by the individualistic and secular ideals of the Enlightenment. The Enlightened absolutist, King Frederick II ("the Great") of Prussia decreed a new divorce law in 1752, in which marriage was declared to be a purely private concern, allowing divorce to be granted on the basis of mutual consent. This new attitude heavily influenced the law in neighbouring Austria under Emperor Joseph II, where it was applied to all non-Catholic Imperial subjects. Divorce was legalised in France after the French revolution on a similar basis, although the legal order of the ancien regime was reinstated at the Bourbon restoration of 1816. The trend in Europe throughout the 19th century, was one of increased liberalisation; by the mid-19th century, divorce was generally granted by civil courts in the case of adultery. In Britain, before 1857 wives were regarded as under the economic and legal protection of their husbands, and divorce was almost impossible. It required a very expensive private Act of Parliament costing perhaps £200, of the sort only the richest could possibly afford. It was very difficult to secure divorce on the grounds of adultery, desertion, or cruelty. The first key legislative victory came with the Matrimonial Causes Act 1857, which passed over the strenuous opposition of the highly traditional Church of England. The new law made divorce a civil affair of the courts, rather than a Church matter, with a new civil court in London handling all cases. The process was still quite expensive, at about £40, but now became feasible for the middle class. A woman who obtained a judicial separation took the status of a feme sole, with full control of her own civil rights. Additional amendments came in 1878, which allowed for separations handled by local justices of the peace. The Church of England blocked