PLAN OF ROSERY, WITH SUNDIAL.
The whole of the ground upon which the house stands, or which forms its base, constitutes the terrace. In such cases the terrace-walls are usually in two or more levels, the upper terrace being mostly parallel with the line of the house, or bowed out at intervals with balconies, while the lower terrace, or terraces, serve as the varying levels of formal gardens, pleasure-grounds, labyrinths, &c. The terraces are approached by wide steps that are treated in a stately and impressive manner. The walls and balustrades, moreover, conform, as they should, to the materials employed in the house; if the house be of stone, as at Haddon, or Brympton, or Claverton, the balustrade is of stone; if the house be of brick, as at Hatfield or Bramshill, the walls and balustrades will be of brick and terra-cotta. The advantage of this agreement of material is obvious, for house and terrace, embraced at one glance, make a consistent whole. There is not, of course, the same necessity for consistency of material in the case of the mere retaining walls.
As one must needs have a system in planning grounds, there is none that will more certainly bring honour and effect to them than the regular geometrical treatment. This is what the architect naturally prefers. The house is his child, and he knows what is good for it. Unlike the imported gardener, who comes upon the scene as a foreign agent, the architect works from the house outwards, taking the house as his centre; the other works from the outside inwards, if he thinks of the "inwards" at all. The first thinks of house and grounds as a whole which shall embrace the main buildings, the outbuildings, the flower and kitchen-gardens, terraces, walls, forecourt, winter-garden, conservatory, fountain, steps, &c. The other makes the house common to the commonplace; owing no allegiance to Art, a specialist of one idea, he holds that the worst thing that can be done is to intrude architectural or geometrical arrangement about a garden, and speaks of a refreshing carpet of grass as preferable.
As to the extent, number, and situation of terraces, this point is determined by the conditions of the house and site. Terraces come naturally if the house be on an eminence, but even in cases where the ground recedes only to a slight extent, the surface of a second terrace may be lowered by increasing the fall of the slope till sufficient earth is provided for the requisite filling. The surplus earth dug out in forming the foundations and cellars of the house, or rubbish from an old building, will help to make up the terrace levels and save the cost of wheeling and carting the rubbish away.
Like all embankments, terrace walls are built with "battered" fronts or outward slope; the back of the wall will be left rough, and well drained. A backing of sods, Mr Milner says, will prevent thrust, and admit of a lessened thickness in the wall. The walls should not be less than three feet in height from the ground-level beneath, exclusive of the balustrade, which is another three feet high.
