There is a piece of advice that would please readers very much, but has never been given to any writer, and it consists of the following: the author whose pages of the books he has are not enough to satisfy his need to comment on them does well to allocate the excess, or the whole of his comments to a work designed specifically for this purpose. By doing so, he avoids, firstly, these comments getting in the way of a narrative that has nothing to do with them, interrupting it and hindering it. Secondly, if such a work exists, it will be good for the author himself, who will have a stimulating store of comments in it, if he does not have a friend or any other real person to perform this function.