To get a good picture of Romano-British gardens of antiquity, we must consider their prototypes in Italy. Horticulture in primitive Italy, as in other countries, was at its beginning merely intended for practical purposes. Gradually the Latin word hortus, applied in the days of republican simplicity to a field of vegetables, was stretched, at the time of the luxurious emperors, to denote pleasure gardens of the utmost magnificence. In this latter period, the source of every new form of Roman art, including garden architecture, was Greece, which in its turn had received inspiration from Egypt, Persia, and Assyria.
Egyptian gardens are the earliest of which definite records still exist. Pictures and inscriptions, dating far back into the centuries before Christ, show that most Egyptian dwellings were built around a series of courtyards containing vegetation both useful and ornamental. Originally, a row of trees along the inner wall of the building shaded it and the enclosed quadrangle. Later, the tree trunks gave place to solid columns, and the overhanging branches to projecting rafters, which resulted in a general effect foreshadowing the Greek peristyle (columned porch...