138. I could not enter, in a popular lecture, upon one intricate and difficult question, closely connected with the subject of Pre-Raphaelitism—namely, the relation of invention to observation; and composition to imitation. It is still less a question to be discussed in the compass of a note; and I must defer all careful examination of it to a future opportunity. Nevertheless, it is impossible to leave altogether unanswered the first objection which is now most commonly made to the Pre-Raphaelite work, namely, that the principle of it seems adverse to all exertion of imaginative power.