eight faces, without its being possible to say where the massive construction ends and the light construction begins." Granting, as one must, that this concealment of the transition is a beauty, one would still like to be quite sure that the Chartres scheme is the best. The Norman clochers being thrown out, and that at Vendome being admittedly simple, the Clocher de Saint-Jean on the Church of Saint-Germain at Auxerre seems to be thought among the next in importance, although it is only about one hundred and sixty feet in height (forty-nine metres), and therefore hardly in the same class with Chartres. Any photograph shows that the Auxerre spire is also simple; and that at Etampes you have seen already to be of the Vendome rather than of the Chartres type. The clocher at Senlis is more "habile"; it shows an effort to be clever, and offers a standard of comparison; but the mediaeval architects seem to have thought that none of them bore rivalry with Laon for technical skill. One of these professional experts, named Villard de Honnecourt, who lived between 1200 and 1250, left a notebook which you can see in the vitrines of the Bibliotheque Nationale in the Rue Richelieu, and which is the source of most that is known about the practical ideas of mediaeval architects. He came to Chartres, and, standing here before the doors, where we are standing, he made a rough drawing, not of the tower, but of the rose, which was then probably new, since it must have been planned between 1195 and 1200. Apparently the tower did not impress him strongly, for he made no note of it; but on the other hand, when he went to Laon, he became vehement in praise of the cathedral tower there, which must have been then quite new: "I have been in many countries, as you can find in this book. In no place have I ever such a tower seen as that of Laon.--J'ai este en mult de tieres, si cum vus pores trover en cest livre. En aucun liu onques tel tor ne vi com est cele de Loon." The reason for this admiration is the same that Viollet-le-Duc gives for admiring the tower of Chartres--the "adresse" with which the square is changed into the octagon. Not only is the tower itself changed into the fleche without visible junction, under cover of four corner tourelles, of open work, on slender columns, which start as squares; but the tourelles also convert themselves into octagons in the very act of rising, and end in octagon fleches that carry up--or once carried up--the lines of profile to the central fleche that soared above them. Clearly this device far surpassed in cleverness the scheme of Chartres, which was comparatively heavy and structural, the weights being adjusted for their intended work, while the transformation at Laon takes place in the air, and challenges discovery in defiance of one's keenest eyesight. "Regard... how the tourelles pass from one disposition to another, in rising! Meditate on it!"