Catholic brother, James, Duke of York. Partly to assuage public fears that the royal family was too Catholic, Charles agreed that James's daughter, Mary, should marry the Protestant William of Orange. In 1678, Titus Oates, who had been alternately an Anglican and Jesuit priest, falsely warned of a "Popish Plot" to assassinate the king, even accusing the queen of complicity. Charles did not believe the allegations, but ordered his chief minister Lord Danby to investigate. While Danby seems to have been rightly sceptical about Oates's claims, the Cavalier Parliament took them seriously. The people were seized with an anti-Catholic hysteria; judges and juries across the land condemned the supposed conspirators; numerous innocent individuals were executed. Later in 1678, Danby was impeached by the House of Commons on the charge of high treason. Although much of the nation had sought war with Catholic France, Charles had secretly negotiated with Louis XIV, trying to reach an agreement under which England would remain neutral in return for money. Danby had publicly professed that he was hostile to France, but had reservedly agreed to abide by Charles's wishes. Unfortunately for him, the House of Commons failed to view him as a reluctant participant in the scandal, instead believing that he was the author of the policy. To save Danby from the impeachment trial, Charles dissolved the Cavalier Parliament in January 1679. The new English Parliament, which met in March of the same year, was quite hostile to Charles. Many members feared that he had intended to use the standing army to suppress dissent or impose Catholicism. However, with insufficient funds voted by Parliament, Charles was forced to gradually disband his troops. Having lost the support of Parliament, Danby resigned his post of Lord High Treasurer, but received a pardon from the king. In defiance of the royal will, the House of Commons declared that the dissolution of Parliament did not interrupt impeachment proceedings, and that the pardon was therefore invalid. When the House of Lords attempted to impose the punishment of exile—which the Commons thought too mild—the impeachment became stalled between the two Houses. As he had been required to do so many times during his reign, Charles bowed to the wishes of his opponents, committing Danby to the Tower of London, in which he was held for another five years. Science In Charles's early childhood, William Cavendish, Earl of Newcastle, was governor of