"To compensate a little for the treachery and weakness of my memory, so extreme that it has happened to me more than once to pick up again, as recent and unknown to me, books which I have read carefully a few years before and scribbled over with my notes, I have adopted the habit of for some time now of adding at the end of each book (I mean of those I intend to use only once) the time I finished reading it and the judgement I have derived of it as a whole, so that this may represent to me at least the sense and general idea I had conceived of the author in reading it."

—Montaigne