decorated with the surface ornament characteristic of the convex school. The relation of the designs to each other is interesting; the cross being prominent in the centre of each, but more richly relieved in that from St. Ambrogio. The two beneath are from the southern portico of St. Mark's; tho shafts having been of different lengths, and neither, in all probability, originally intended for their present place, they have double abaci, of which the uppermost is the cornice running round the whole façade. The zigzagged capital is highly curious, and in its placo very effectivo and beautiful; although one of the exceptions which it was above noticed that we should sometimes find to the law stated in § xv. above.

§ XLII. The lower capital, which is also of the true convex school, exhibits one of the conditions of the spurred type, e of Fig. XXII., respecting which one or two points must be noticed.

If wo wero to tako up tho plan of the simple spur, reprosented at ein Fig. XXII., p.. 117, and treat it, with the salvia leaf, as we did the spur of the base, we should have for the head of our capital a plan like Fig. LXVI., which is actually that of one of the capitals of the Fondaco de' Turchi at Venice; with this only difference, that the intermediato curves between the spurs would have been circular: the reason they are not so, here, is that the decoration, instead of being confined to the spur, is now spread over the whole mass, and contours are therefore given to the intermediate curves which fit them for this ornament; the inside shaded space being the head of the shaft, and the outer, the abacus. The reader has in Fig. LXVI. a characteristic type of the plans of the spurred capitals, generally preferred by the sculptors of the convex school, but treated with infinite variety, the spurs often being cut into

FIG. LXVI.

animal forms, or the incisions between them multiplied, for richer effect; and in our own Norman capital the type c of Fig. XXII. is variously subdivided by incisions on its slope, approximating in general effect to many conditions of the real spurred type, e, but totally differing from them in principle.

§ XLIII. The treatment of the spur in the concave school is far more complicated, being borrowed in nearly every case from the original Corinthian. Its plan may be generally represented by Fig. LXVII The spur itself is carved into

a curling tendril or concave leaf, which supports the projecting angle of a four-sided abacus, whose hollow sides fall back behind the bell, and have generally a rosette or other ornament in their centres. The medieval architects often put another square abacus above all, as represented by the shaded portion of Fig. LXVII.. and some massy conditions of this form, elaborately ornamented, are very bonutiful; but it is apt to become rigid and effeminate, as assuredly it is in the original Corinthian, which is thoroughly mean and meagre in its upper tendrils and abacus.

§ XLIV. The lowest capital in Plate XVIII. is from St. Mark's, and singular in having double spurs; it is therefore to be compared with the doubly spurred base, also from St. Mark's, in Plate XI. In other respects it is a good example of the union of breadth of mass with subtlety of curvature,

which characterises nearly all the spurred capitals of the convex school. Its plan is given in Fig. LXVIII.: the inner shaded circle is the head of the shaft; the white cross, the bottom of the capital, which expands itself into the external shaded portions at the top. Each spur, thus formed, is cut like a ship's bow, with the Doric profile; the surfaces so obtained are then charged with arborescent ornament.

§ XLV. I shall not here farther exemplify the conditions of the treatment of the spur, because I am afraid of confusing the reader's mind, and diminishing the distinctness of his conception of the differences between the two great orders, which it has been my principal object to develope throughout this chapter. If all my readers lived in London, I could at once fix this difference in their minds by a simple, yet somewhat curious illustration. In many parts of the west end of London, as, for instanco, at the corners of Belgrave Square, and the north side of Grosvenor Square, the Corinthian capitals of newly-built houses are put into cages of wire. The wire cage is the exact form of the typical capital of the convex school; the Corinthian capital, within, is a finished and highly decorated example of the concave. The space between the cage and capital is the limit of ornamentation.

§ XLVI. Those of my readers, however, to whom this illustration is inaccessible, must be content with the two profiles, 13 and 14, on Plate XV. If they will glance along the line. of sections from 1 to 6, they will seo that the profile 13 is their final development, with a superadded cornice for its abacus. It is taken from a capital in a very important ruin of a palace, near the Rialto of Venice, and hereafter to be described; the projection, outside of its principal curve, is the profile of its superadded leaf ornamentation; it may be taken as one of the simplest, yet a perfect type of the concave group.

§ XLVII. The profile 14 is that of the capital of the main shaft of the northern portico of St. Mark's, the most finished example I ever met with of the convex family, to which, in spite of the central inward bend of its profile, it is marked as distinctly belonging, by the bold convex curve at its root, springing from the shaft in the line of the Christian Doric

cornice, and exactly reversing the structure of the other profile, which rises from the shaft, like a palm leaf from its stem. Farther, in the profile 13, the innermost line is that of the bell; but in the profile 14, the outermost line is that of the bell, and the inner line is the limit of the incisions of the chisel, in undercutting a reticulated veil of ornament, surrounding a flower liko n lily; most ingeniously, and, I hope, justly, conjectured by the Marchese Selvatico to have been intended for an imitation of the capitals of the temple of Solomon, which Hiram made, with "nets of checker work, and wreaths of chain work for the chapiters that were on the top of the pillars . . . and the chapiters that were upon the top of the pillars wero of lily work in the porch." (1 Kings, vii. 17, 19.)

§ XLVIII. On this exquisite capital there is imposed an abacus of the profile with which we began our investigation long ago, the profile a of Fig. V. This abacus is formed by the cornice already given, a, of Plate XVI.: and therefore wo have, in this lovely Venetian capital, the summary of the rcsults of our investigation, from its beginning to its close: the type of the first cornice; the decoration of it, in its emergence from the classical models; the gathering into the capital; the superimposition of the secondary cornice, and tho refinement of the bell of the capital by triple curvature in the two limits of chiselling. I cannot express the exquisite refinements of the curves on the small scale of Plate XV.; I will give them more accurately in a larger engraving; but the scale on which they are here given will not prevent the reader from perceiving, and let him note it thoughtfully, that the outer curvo of the noblo enpital is the ono which was our first example of associated curves; that I have had no need, throughout the whole of our inquiry, to refer to any other ornamental line than the three which I at first chose, the simplest of those which Nature set by chance before me; and that this lily, of the delicate Venetian marble, has but been wrought, by the highest human art, into the same line which the clouds disclose, when they break from the rough rocks of the flank of the Matterhorn.

CHAPTER XXVIII.

THE ARCHIVOLT AND APERTURE

§ 1. Ir the windows and doors of some of our best northern Gothic buildings were built up, and the ornament of their archivolts concealed, there would often remain little but masses of dead wall and unsightly buttress; the whole vitality of the building consisting in the graceful proportions or rich mouldings of its apertures. It is not so in the south, where, frequently, the aperture is a mere dark spot on the variegated wall; but there the column, with its horizontal or curved architraye, assumes an importance of another kind, equally dependent upon the methods of lintel and archivolt decoration. These, though in their richness of minor variety they defy all exemplification, may be very broadly generalized.

b

Of the mere lintel, indeed, there is no specific decoration, nor can be; it has no organism to direct its ornament, and therefore may receive any kind and degree of ornament, according to its position. In a Greek temple, it has meagre horizontal lines; in a Romanesque church, it becomes a row of upright niches, with an apostle in each; and may become anything else at the architect's will. But the arch head has a natural organism, which separates its ornament into distinct families, broadly definable.

§ II. In speaking of the arch-line and arch masonry, we considered the arch to be cut straight through the wall; so that, if half built, it would have the appearance at a, Fig. LXIX. But in the chapter on Form of Apertures, we found that the side of the arch, or jamb of the aperture, might often require to be bevelled, so as to give the section b, Fig. LXIX. It is easily

FIG. LXIX.