preserved a monument to a standard-bearer of the 9th legion, which is probably of the period of Agricola, and it is likely that Eburacum became the headquarters of the Roman army in the north soon after the conquest. It became the chief military town in the island; for, whereas the southern tribes were soon subdued, those in the north were long rebellious, and it was natural that the chief centre for troops should be established in the more disturbed parts of Britain. Close to York was the town of Isurium (Aldborough), where remains of pavements have been discovered, and where it is probable that the wealthier citizens of York had their homes. Eburacum was fortified in or before the reign of Trajan, and was connected by a system of roads with other important Roman towns. The Roman Camp lay on the east side of the river, on or near the site of the present minster. One of its corner towers and fragments of the wall still remain, and parts of the city gates have been discovered. The camp at first covered about seventy acres of ground; it was afterwards enlarged on the south. The modern streets of Petergate and Stonegate represent the roads which passed through this camp, and Bootham Bar is on the site of one of the gates. Remains of Roman pavement have been discovered below Stonegate. The city itself spread westward over the river, and fragments of houses and tesselated pavements have been discovered. In 1841 remains of public baths were found; and there are many signs that there was a large population on this side of the river. In 1854 there was found near the southern gate of the camp a tablet dedicated to Trajan, and commemorating the conclusion of some work done by the 9th legion in the year 108-9. This work was perhaps the palace of the emperors. Near the south gate also was a Christian Church of St. Crux. The road to Tadcaster was lined with tombs, and remains of cemeteries have been discovered all round the city. As in London, there are few remains of Roman masonry above ground, and this is but natural, for the city has been burnt and destroyed, wholly or partially, many times; and there is no doubt that Roman buildings were used, as in Rome and other cities, as a quarry for later erections.