It is often possible to detect the course of Roman streets where now the golden corn is growing. On the surface of the roads where the ground is thin, the corn is scanty. Observation of this kind a few years ago led to the discovery of a Romano-British village at Long Whittenham, in Berks. In Silchester it is quite easy to trace the course of the streets by the thinness of the corn, as Leland observed as long ago as 1536. One is inclined to wonder where all the earth comes from, which buries old buildings and hides them so carefully; but any student of natural history, who has read Darwin's book on _Worms_, will cease to be astonished. It is chiefly through the action of these useful creatures that soil accumulates so greatly on the sites of ancient buildings. [Illustration: SILCHESTER. PLAN OF CITY] Within the walls of Silchester were gardens and villas replete with all the contrivances of Roman luxury. The houses were built on three sides of a square court. A cloister ran round the court, supported by pillars. The open space was used as a garden. At the back of the house were the kitchens and apartments for the slaves and domestics. The Romans adapted their dwellings to the climate in which they lived. In the sunny south, at Pompeii, the houses were more open, and would be little suited to our more rigorous climate. They knew how to make themselves comfortable, built rooms well protected from the weather, and heated with hypocausts. These were furnaces made beneath the house, which generated hot air; and this was admitted into the rooms by earthenware flue-tiles. The dwellers had both summer and winter apartments; and when the cold weather arrived the hypocaust furnaces were lighted, and the family adjourned to their winter quarters. The floors were made of _tesserae_, or small cubes of different materials and various colours, which were arranged in beautiful patterns. Some of these pavements were of most elegant and elaborate designs, having figures in them representing the seasons, or some mythological characters. The walls were painted with decorations of very beautiful designs, representing the cornfields, just as the Roman artists in Italy loved to depict the vine in their mural paintings. The mortar used by the Romans is very hard and tenacious, and their bricks were small and thin, varying from 8 inches square to 18 inches by 12, and were about 2 inches in thickness. Frequently we find the impression of an animal's foot on these bricks and tiles, formed when they were in a soft state before they were baked, and one tile recently found had the impression of a Roman baby's foot. Roman bricks have often been used by subsequent builders, and are found built up in the masonry of much later periods. [Illustration: CAPITAL OF COLUMN]