The Scots had heard of their coming and were safely hiding in their fastnesses when the Romans reached the Borderland. Then the Romans built a great wall from sea to sea between the two countries, Scotland and Britain, a wall that must have taken several years to build even if they had thousands of men to build it. It was made of the finest stone, which they seem to have carried many miles across the country. It was nine feet wide and eighteen feet high and the turrets were placed so near together that the sentinels could call to one another and so send a message quickly. Below the wall, on the enemy's side, they dug a deep ditch, often having to make it through the hard limestone rock. Every mile, they built a spacious fort for the soldiers to rest in, well defended and quite close to the wall. Every four miles, there was a station, sometimes a small town, surrounded by a wide wall, too, where perhaps the chief officers lived. From station to station, from east to west, ran the great road, for the traffic of the army. Up to the gates of the stations, too, came the new Roman roads from the south, for the army sometimes had to call for help from other places and needed food and many things from the south. It must have been a stern duty to keep watch in the bleak winter months, and the soldiers seem to have had few comforts. The remains of this great wall still lie from Wallsend to the west coast. At the cross-roads, by the great rivers, the Romans built their towns and camps all over Britain, just like those they had known in Italy. Every town was surrounded by a great wall, whence the soldiers could keep a look-out for the enemy, and nobody could enter the place except through the gates between sunrise and sunset. Outside the town, they sometimes built an amphitheatre, where games and wild beast fights were held on holidays. The houses of the chief officers were built like those in sunny Italy. The most interesting room in the house was the bath-room, with a large tank, like a swimming bath, in the floor and a furnace to keep a good supply of hot water. The floor was paved with beautiful coloured tiles and scenes were painted on the walls. This room was very important, because the Roman often received his guests there and sometimes invited them to share in the ceremony of the bath. The garden was often lovely, there were orchards and smooth lawns and closely clipped hedges of box and yew, sometimes cut into fantastic shapes like birds and beasts. There were brightly coloured flowers, which had been brought from Italy--geraniums, roses and orchids. Then, there was the summer house, whose walls were made of tall trees growing close together, and inside were couches and rugs and sometimes even a little lake in the centre, where jellies and fruits were to be seen floating in beautiful dishes, to keep them cool and fresh, as though the summer in Britain were very hot.