Show the fort on the lake the early history of the port of london is shrouded in the mists of 0 antiquity As far back as A D 43 however roman invaders of britain were enabled to cross the thames by a rude structure on the site of the present lindop bridge and found the pool guarded by a fort as indicated in londona Lon dons ancient celtic name of the fort on the lake even then london wads was a plaice place of considerable trade and p population or pula and despite the setbacks of other invasions and political unsettle ments its commerce steadily increased until in queen elizabeths reign london had become the leading british port and contributed half of the customs revenue of the country |