a strict line of demarcation, and to bring all critical work under one or the other head of this exhaustive division.  Criticism without accurate science of the thing criticised can indeed have no other value than may belong to the genuine record of a spontaneous impression; but it is not less certain that criticism which busies itself only with the outer husk or technical shell of a great artist’s work, taking no account of the spirit or the thought which informs it, cannot have even so much value as this.  Without study of his forms of metre or his scheme of colours we shall certainly fail to appreciate or even to apprehend the gist or the worth of a painter’s or a poet’s design; but to note down the number of special words and cast up the sum of superfluous syllables used once or twice or twenty times in the structure of a single poem will help us exactly as much as a naked catalogue of the colours employed in a particular picture.  A tabulated statement or summary of the precise number of blue or green, red or white draperies to be found in a precise number of paintings by the same hand will not of itself afford much enlightenment to any but the youngest of possible students; nor will a mere list of double or single, masculine or feminine terminations discoverable in a given amount of verse from the same quarter prove of much use or benefit to an adult reader of common intelligence.  What such an one requires is the guidance which can be given by no metremonger or colour-grinder:  the suggestion which may help him to discern at once the cause and the effect of every choice or change of metre and of colour; which may show him at one glance the reason and the result of every shade and of every tone which tends to compose and to complete the gradual scale of their final harmonies.  This method of study is generally accepted as the only one applicable to the work of a great painter by any criticism worthy of the name:  it should also be recognised as the sole method by which the work of a great poet can be studied to any serious purpose.  For the student it can be no less useful, for the expert it should be no less easy, to trace through its several stages of expansion and transfiguration the genius of Chaucer or of Shakespeare, of Milton or of Shelley, than the genius of Titian or of Raffaelle, of Turner or of Rossetti.  Some great artists there are of either kind in whom no such process of growth or transformation is perceptible:  of these are Coleridge and Blake; from the sunrise to the sunset of their working day we can trace no demonstrable increase and no visible diminution of the divine capacities or the inborn defects of either man’s genius; but not of such, as a rule, are the greatest among artists of any sort.