river for the people: it was not; it was the means of conveying merchandise to and fro; it was a construction most important for military purposes; it was a barrier to prevent a hostile fleet from getting higher up the river; but, for the ordinary passenger, the boat was the quicker and the easier means of conveyance. When was the Bridge built? It is impossible to say. It was not there A.D. 61, when Queen Boadicea's troops sacked the City and murdered the people. It was there when Allectus led his troops out to fight the Roman legions. It was there very early in the Roman occupation, as is proved by the quantities of Roman coins of the four centuries of their tenure found in the bed of the river on the site of the old Bridge. It is also proved by the fact that Southwark was a settlement of the wealthier class, who could not have lived in a place absolutely without supplies, had there been no bridge. We may take any time we please for the construction of the Bridge, so long as it is quite early--say, before the second century. The building of the Bridge can be arrived at with such great certainty that I have no hesitation in presenting a drawing of it. As this Bridge has never before been figured by the pencil of any artist, it will be well for me to indicate the steps by which its reconstruction has been made possible. [Illustration: Merchants crossing Southwark Marsh] The Britons themselves were quite unable to construct a bridge of any kind, unless in the primitive methods observed at Post Bridge and Two Bridges, on Dartmoor, by a slab of stone laid across two boulders. The work, therefore, was certainly undertaken by Roman engineers. We have, in the next place, to inquire what kind of bridge was built at that time by the Romans. They built bridges of wood and of stone; many of these stone bridges still remain, in other cases the pieces of hewn stone still remain. The Bridge over the Thames, however, was of wood. This is proved by the fact that, had it been of the solid Roman construction in stone, the piers would be still remaining; also by the fact that London had to be contented with a wooden bridge till the year 1176, when the first bridge of stone was commenced. Considerations as to the comparative insignificance of London in the first century, as to the absence of stone in the neighbourhood, and as to the plentiful supply of the best wood in the world from the forests north of the City, confirm the theory that the Bridge was built of wood. We have only, therefore, to learn how Roman engineers built bridges of wood elsewhere, in order to know how they built a bridge of wood over the Thames. And this we know without any doubt.