All the houses--the exceptions in each street are so few they can be counted on one's fingers--are inclined more or less, and the greater number lean so much that the roof of one projects half a meter beyond that of the next house if it happens to be straight or but slightly inclined. The strangest part of it all is, that adjoining houses lean in different directions; one will lean forward as if it were going to topple over, another backward, some to the right, others to the left. In some places, where six or seven neighboring houses all lean forward, those in the middle being most inclined, they form a curve, like a railing that is bent by the pressure of a crowd. In some places two houses which stand close together bend toward each other, as if for mutual support. In certain streets for some distance all the houses lean sideways, like trees which the wind has blown one against the other; then again, they all lean in the opposite direction, like another row of trees bent by a contrary wind. In some places there is a regularity in the inclination, which makes the effect less noticeable. On certain crossways and in some of the smaller streets there is an indescribable confusion, a real architectural riot, a dance of houses, a disorder that seems animated. There are houses that appear to fall forward, overcome by sleep; others that throw themselves backward as if in fright; some lean toward each other till their roofs almost touch, as if they were confiding secrets; some reel against each other as though tipsy; a few lean backward between others that lean forward, like malefactors being dragged away by policemen. Rows of houses seem to be bowing to church-steeples; other groups are paying attention to one house in their centre, and seem to be plotting against some palace. I will soon let you into the secret of all this. [Illustration: In Rotterdam.] But it is neither the shape of the houses nor their inclination that seemed to me the most curious thing about them. One must observe them carefully, one by one, from top to bottom, and in their diversity they are as interesting as a picture.