Commoner mud-and-tile plastered walls, having no wooden framing, and carrying a tile roof of smaller projection, are often employed to enclose grounds of less importance. Examples may be seen in those surrounding the property of H.I.H. Prince Arisugawa, and in parts of the Imperial Palace, in Tokio. A similiar form of enclosed wall, in simpler construction, is shown in Fig. 17, which serves also to illustrate a common practise of planting trees in the corners of such boundaries.