Variety, how produced.-I do not mean to make separate groves or woods of different trees, although that has its beauty, but, in the course of the drive, to let oaks prevail in some places, beech in others, birch in a third; and, in some parts, to encourage such masses of thorns, hazel, and maple, hollies, or other brush-wood of low growth, as might best imitate the thickets of a forest *.
*[It is difficult to lay down rules for any system of planting, which may ultimately be useful to this purpose; time, neglect, and accident, will often produce unexpected beauties. The gardener, or nurseryman, makes his holes at equal distances, and, generally, in straight rows; he then fills the holes with plants, and carefully avoids putting two of the same sort near each other; nor is it very easy to make him ever put two or more trees into the same hole, or within a yard of each other: he considers them as cabbages, or turnips, which will rob each other's growth, unless placed at equal distances; although, in forests, we most admire those double trees, or thick clusters, whose stems seem to rise from the same root, entangled with the roots of thorns and bushes in every direction.]
