We learn from Tacitus that in A.D. 61 the Roman city was a place of some importance--the chief residence of merchants and the great mart of trade--therefore we cannot doubt but that to have grown to this condition it must have existed before the Christian era. The Romans appear to have built a fort where the Tower of London now stands, but not originally to have fortified the town. London grew to be a flourishing centre of commerce, though not a place capable of sustaining a siege, so the Roman general, Paullinus Suetonius, would not run the risk of defending it against Boadicea. Afterwards the walls were erected, and Londinium took its proper position in the Roman Empire. It was on the high road from Rome to York, and the starting-point of half the roads in Britain. Bishop Stubbs wrote: 'Britain had been occupied by the Romans, but had not become Roman.' Probably few Romans settled here. The inhabitants consisted of the Governor and the military officers and Romanised Britons. When the Roman legions left this country Londinium must have had a very mixed population of traders. There were no leaders, and a wail went up from the defenceless inhabitants. In the year 446 we hear of 'The groans of the Britons to Aetius, for the third time Consul,' which took this form of complaint: 'The savages drive us to the sea, and the sea casts us back upon the savages; so arise two kinds of death, and we are either drowned or slaughtered.'[3] In this place, however, we have not to consider the condition either of British or Roman London, for the Middle Ages may be said to commence with the break up of the Roman Empire. Saxon London was a wooden city, surrounded by walls, marking out the same enclosure that existed in the latest Roman city. We have the authority of the Saxon Chronicle for saying that in the year 418 the Romans collected all the treasures that were in Britain, and hid some of them in the earth. From the date of the departure of the Roman legions to that of the Norman Conquest nearly six centuries and a half had elapsed. Of this long period we find only a few remains, such as some articles discovered in the river, and some entries in that incomparable monument of the past--the Saxon Chronicle. All we really know of Saxondom we learn from the Chronicle, Bede's _Ecclesiastical History_, and the old charters. The history of England for the greater portion of this time was local and insular, for the country was no longer a part of a great empire. Professor Earle tells us that the name London occurs fifty times in the Chronicle, and Londonburh thirteen times, but we do not know whether any distinction between the two names was intended to be indicated.