[104] He learned here the art of going deep, of tracking the sources of expression to their subtlest retreats, the power of an intimate presence in the things he handled. He did not at once or entirely desert his art; only he was no longer the cheerful, objective painter, through whose soul, as through clear glass, the bright figures of Florentine life, only made a little mellower and more pensive by the transit, passed on to the white wall. He wasted many days in curious tricks of design, seeming to lose himself in the spinning of intricate devices of line and colour. He was smitten with a love of the impossible--the perforation of mountains, changing the course of rivers, raising great buildings, such as the church of San Giovanni, in the air; all those feats for the performance of which natural magic professed to have the key. Later writers, indeed, see in these efforts an anticipation of modern mechanics; in him they were rather dreams, thrown off by the overwrought and labouring brain. Two ideas were especially confirmed in him, as reflexes of things that had touched his brain in childhood beyond the depth of other impressions--the smiling of women and the motion of great waters. And in such studies some interfusion of the extremes of beauty and terror shaped itself, as an image that might be seen and touched, in the mind of this gracious youth, so fixed that for the rest of his life it never left him. As if catching [105] glimpses of it in the strange eyes or hair of chance people, he would follow such about the streets of Florence till the sun went down, of whom many sketches of his remain. Some of these are full of a curious beauty, that remote beauty which may be apprehended only by those who have sought it carefully; who, starting with acknowledged types of beauty, have refined as far upon these, as these refine upon the world of common forms. But mingled inextricably with this there is an element of mockery also; so that, whether in sorrow or scorn, he caricatures Dante even. Legions of grotesques sweep under his hand; for has not nature too her grotesques--the rent rock, the distorting lights of evening on lonely roads, the unveiled structure of man in the embryo, or the skeleton?