§ VII. Before passing to the dripstone, however, let us examine a little farther into the nature of the true cornice. We cannot, indeed, render either of the forms b or c, [Fig. V.], perfectly protective from rain, but we can help them a little in their duty by a slight advance of their upper ledge. This, with the form b, we can best manage by cutting off the sharp upper point of its curve, which is evidently weak and useless; and we shall have the form f. By a slight advance of the upper stone c, we shall have the parallel form g.
These two cornices, f and g, are characteristic of early Byzantine work, and are found on all the most lovely examples of it in Venice. The type a is rarer, but occurs pure in the most exquisite piece of composition in Venice—the northern portico of St. Mark’s; and will be given in due time.
§ VIII. Now the reader has doubtless noticed that these forms of cornice result, from considerations of fitness and necessity, far more neatly and decisively than the forms of the base, which we left only very generally determined. The reason is, that there are many ways of building foundations, and many good ways, dependent upon the peculiar accidents of the ground and nature of accessible materials. There is also room to spare in width, and a chance of a part of the arrangement being concealed by the ground, so as to modify height. But we have no room to spare in width on the top of a wall, and all that we do must be thoroughly visible; and we can but have to deal with bricks, or stones of a certain degree of fineness, and not with mere gravel, or sand, or clay,—so that as the conditions are limited, the forms become determined; and our steps will be more clear and certain the farther we advance. The sources of a river are usually half lost among moss and pebbles, and its first movements doubtful in direction; but, as the current gathers force, its banks are determined, and its branches are numbered.
§ IX. So far of the true cornice: we have still to determine the form of the dripstone.
| Fig. VI. |
We go back to our primal type or root of cornice, a of [Fig. V.] We take this at a in [Fig. VI.], and we are to consider it entirely as a protection against rain. Now the only way in which the rain can be kept from running back on the slope of X is by a bold hollowing out of it upwards, b. But clearly, by thus doing, we shall so weaken the projecting part of it that the least shock would break it at the neck, c; we must therefore cut the whole out of one stone, which will give us the form d. That the water may not lodge on the upper ledge of this, we had better round it off; and it will better protect the joint at the bottom of the slope if we let the stone project over it in a roll, cutting the recess deeper above. These two changes are made in e: e is the type of dripstones; the projecting part being, however, more or less rounded into an approximation to the shape of a falcon’s beak, and often reaching it completely. But the essential part of the arrangement is the up and under cutting of the curve. Wherever we find this, we are sure that the climate is wet, or that the builders have been bred in a wet country, and that the rest of the building will be prepared for rough weather. The up cutting of the curve is sometimes all the distinction between the mouldings of far-distant countries and utterly strange nations.
| Fig. VII. |
[Fig. VII.] representing a moulding with an outer and inner curve, the latter undercut. Take the outer line, and this moulding is one constant in Venice, in architecture traceable to Arabian types, and chiefly to the early mosques of Cairo. But take the inner line; it is a dripstone at Salisbury. In that narrow interval between the curves there is, when we read it rightly, an expression of another and mightier curve,—the orbed sweep of the earth and sea, between the desert of the Pyramids, and the green and level fields through which the clear streams of Sarum wind so slowly.
| Fig. VIII. |
And so delicate is the test, that though pure cornices are often found in the north,—borrowed from classical models,—so surely as we find a true dripstone moulding in the South, the influence of Northern builders has been at work; and this will be one of the principal evidences which I shall use in detecting Lombard influence on Arab work; for the true Byzantine and Arab mouldings are all open to the sky and light, but the Lombards brought with them from the North the fear of rain, and in all the Lombardic Gothic we instantly recognize the shadowy dripstone: a, [Fig. VIII.], is from a noble fragment at Milan, in the Piazza dei Mercanti; b, from the Broletto of Como. Compare them with c and d; both from Salisbury; e and f from Lisieux, Normandy; g and h from Wenlock Abbey, Shropshire.