Called on Lady Canning this morning, who wanted me to read some of her papers. Most of them (which are very curious) I had seen before, but forgotten. I read the long minute of Canning's conversation with the King ten days before his Majesty put the formation of the Administration in his hands. They both appear to have been explicit enough. The King went through his whole life, and talked for two hours and a half, particularly about the Catholic question, on which he said he had always entertained the same opinions--the same as those of George III. and the Duke of York--and that with the speech of the latter he entirely concurred, except in the 'so help me God' at the end, which he thought unnecessary. He said _he_ had wished the Coronation Oath to be altered, and had proposed it to Lord Liverpool. His great anxiety was not to be annoyed with the discussion of the question, to keep Canning and Lord Liverpool's colleagues, and to put at the head of the Treasury some anti-Catholic Peer. This Canning would not hear of; he said that having lost Lord Liverpool he had lost his only support in the Cabinet, that the King knew how he had been thwarted by others, and how impossible it would have been for him to go on but for Lord Liverpool, that he could not serve _under_ anybody else, or act with efficacy except as First Minister, that he would not afford in his person an example of any such rule as that support of the Catholic question was to be _ipso facto_ an exclusion from the chief office of the Government, that he advised the King to try and make an anti-Catholic Ministry, and thought that with his feelings and opinions on the subject it was what he ought to do. This the King said was out of the question. In the course of the discussion Canning said that if he continued in his service he must continue as free as he had been before; that desirous as he was to contribute to the King's ease and comfort, he could not in any way pledge himself on the subject, because he should be assuredly questioned in the House of Commons, and he must have it in his power to reply that he was perfectly free to act on that question as he had ever done, and that he thought the King would better consult his own ease by retaining him in office without any pledge, relying on his desire above all things to consult his Majesty's ease and comfort. He said among other things that, though leader of the House of Commons, he had never had any patronage placed at his disposal, nor a single place to give away. [Page Head: THE DUKE AND MR. CANNING.]