In accepting the trust and deposit which Mr. Greville thought fit to place in my hands, I felt, and still feel, that I undertook a task and a duty of considerable responsibility; but from the time and the manner in which it was offered me I could not decline it. I had lived for more than five-and-twenty years in the daily intercourse of official life and private friendship with Mr. Greville. Sir George Cornewall Lewis, to whom he had previously intended to leave these Journals, died before him. After that event, deeply to be regretted on so many accounts, Mr. Greville did me the honour to select me for the performance of this duty, which was unexpected by myself; and my strong attachment and gratitude to him for numberless acts of kindness and marks of confidence bound me by every consideration to obey and execute the wishes of my late friend.
In the discharge of this trust I have been guided by no other motive than the desire to present these Memorials to the world in a manner which their Author would not have disapproved, and in strict conformity with his own wishes and injunctions. He himself, it should be said, had frequently revised them with great care. He had studiously omitted and erased passages relating to private persons or affairs, which could only serve to gratify the love of idle gossip and scandal. The Journals contain absolutely nothing relating to his own family, and but little relating to his private life. In a passage (not now published) of his own writings, the Author remarks:--
'A journal to be good, true, and interesting, should be written without the slightest reference to publication, but without any fear of it: it should be the transcript of a mind that can bear transcribing. I always contemplate the possibility that hereafter my journal will be read, and I regard with alarm and dislike the notion of its containing matters about myself which nobody will care to know' (January 2nd, 1838).
These notes were designed chiefly to preserve a record of the less known causes and details of public events which came under the Author's observation, and they are interspersed with the conversations of many of the eminent men with whom he associated. But it must be borne in mind that they are essentially what they profess to be--a _contemporary_ record of facts and opinions, not altered or made up to square with subsequent experience. Hence some facts may be inaccurately stated, because they are given in the shape they assumed at the time they were recorded, and some opinions and judgments on men and things are at variance (as he himself acknowledges and points out) with those at which the writer afterwards arrived on the same persons and subjects. Our impressions of what is passing around us vary so rapidly and so continually, that a contemporary record of opinion, honestly preserved, differs very widely from the final and mature judgment of history: yet the judgment of history must be based upon contemporary evidence. It was remarked by an acute observer to Mr. Greville himself, that the _nuances_ in political society are so delicate and numerous, the details so nice and varying, that unless caught at the moment they escape, and it is impossible to collect them again. That is the charm and the merit of genuine contemporary records.