§ 8. But if a painter has inventive power he is to treat his subject in a totally different way; giving not the actual facts of it, but the impression it made on his mind.
And now, once for all, let it be clearly understood that an "impression on the mind" does not mean a piece of manufacture. The way in which most artists proceed to "invent," as they call it, a picture, is this: they choose their subject, for the most part, well, with a sufficient quantity of towers, mountains, ruined cottages, and other materials, to be generally interesting; then they fix on some object for a principal light; behind this they put a dark cloud, or, in front of it, a dark piece of foreground; then they repeat this light somewhere else in a less degree, and connect the two lights together by some intermediate ones. If they find any part of the foreground uninteresting they put a group of figures into it; if any part of the distance, they put something there from some other sketch; and proceed to inferior detail in the same manner, taking care always to put white stones near black ones, and purple colors near yellow ones, and angular forms near round ones;--all being as simply a matter of recipe and practice as cookery; like that, not by any means a thing easily done well, but still having no reference whatever to "impressions on the mind."
§ 9. But the artist who has real invention sets to work in a totally different way. First, he receives a true impression from the place itself, and takes care to keep hold of that as his chief good; indeed, he needs no care in the matter, for the distinction of his mind from that of others consists in his instantly receiving such sensations strongly, and being unable to lose them; and then he sets himself as far as possible to reproduce that impression on the mind of the spectator of his picture.
Now, observe, this impression on the mind never results from the mere piece of scenery which can be included within the limits of the picture. It depends on the temper into which the mind has been brought, both by all the landscape round, and by what has been seen previously in the course of the day; so that no particular spot upon which the painter's glance may at any moment fall, is then to him what, if seen by itself, it will be to the spectator far away; nor is it what it would be, even to that spectator, if he had come to the reality through the steps which Nature has appointed to be the preparation for it, instead of seeing it isolated on an exhibition wall. For instance, on the descent of the St. Gothard, towards Italy, just after passing through the narrow gorge above Faïdo, the road emerges into a little breadth of valley, which is entirely filled by fallen stones and débris, partly disgorged by the Ticino as it leaps out of the narrower chasm, and partly brought down by winter avalanches from a loose and decomposing mass of mountain on the left. Beyond this first promontory is seen a considerably higher range, but not an imposing one, which rises above the village of Faïdo. The etching, Plate 20, is a topographical outline of the scene, with the actual blocks of rock which happened to be lying in the bed of the Ticino at the spot from which I chose to draw it. The masses of loose débris (which, for any permanent purpose, I had no need to draw, as their arrangement changes at every flood) I have not drawn, but only those features of the landscape which happen to be of some continual importance. Of which note, first, that the little three-windowed building on the left is the remnant of a gallery built to protect the road, which once went on that side, from the avalanches and stones that come down the "couloir"[9] in the rock above. It is only a ruin, the greater part having been by said avalanches swept away, and the old road, of which a remnant is also seen on the extreme left, abandoned, and carried now along the hillside on the right, partly sustained on rough stone arches, and winding down, as seen in the sketch, to a weak wooden bridge, which enables it to recover its old track past the gallery. It seems formerly (but since the destruction of the gallery) to have gone about a mile farther down the river on the right bank, and then to have been carried across by a longer wooden bridge, of which only the two abutments are seen in the sketch, the rest having been swept away by the Ticino, and the new bridge erected near the spectator.