This national policy, however, could only be pursued, and the minister could only maintain himself in power, by acquiescence in the king's personal relations with the king of France settled by the disgraceful Treaty of Dover in 1670, which included Charles's acceptance of a pension, and bound him to a policy exactly opposite to Danby's, one furthering French and Roman ascendancy.
In 1678, on the rupture of relations between Charles and Louis, a splendid opportunity was afforded Louis of paying off old scores by disclosing Danby's participation in the king's demands for French gold.
And Barillon, the French ambassador, by whom he was supplied with a large sum of money, arranged a plan for effecting Danby's ruin.
He obtained a seat in parliament; and in spite of Danby's endeavour to seize his papers by an order in council, on the 10th of December 1678 caused two of the incriminating letters written by Danby to him to be read aloud to the House of Commons by the Speaker.
The House immediately resolved on Danby's impeachment.
A number of pamphlets asserting the complicity of the fallen minister in the Popish Plot, and even accusing him of the murder of, Sir Edmund Berry Godfrey, were published in 1679 and 1680; they were answered by Danby's secretary, Edward Christian, in Reflections; and in May 1681 Danby was actually indicted by the Grand Jury of Middlesex for Godfrey's murder on the accusation of Edward FitzHarris.
This principle, first asserted by a resolution of the House of Commons in the earl of Danby's case (May 5, 1679), forms one of the provisions of the Act of Settlement, 12 & 13 Will.
When the secret treaty with France became known, thus confirming Sacheverell's insight, the latter called for the disbandment of the forces and advocated the refusal of further supplies for military purposes; and in June 1678 he resolutely opposed Lord Danby's proposal to grant £300,000 per annum to Charles II.
He was a member of the committee for drafting the articles of impeachment against Danby in 1678, and was appointed one of the managers of the Commons; and in 1679, when the impeachment, interrupted by the dissolution of parliament, was resumed in the new parliament, he spoke strongly against the validity of Danby's plea of pardon by the king.
On the 17th of February 1676, with Danby's knowledge, Charles concluded a further treaty with Louis by which he undertook to subordinate entirely his foreign policy to that of France, and received an annual pension of £100,000.