The drawbridge of London Bridge having been lowered by treachery, Tyler and his followers crossed the Thames; and being joined by thousands of London apprentices, artisans and criminals, they sacked and burnt John of Gaunt's splendid palace of the Savoy, the official residence of the treasurer, Sir Robert Hales, and the prisons of Newgate and the Fleet.
Formerly a moat flanked the city on theland sides, and a drawbridge at each of six gates was raised every night.
An excellent harbour is furnished by the natural channel between the two islands; and communication from one division to the other is afforded by two bridges - the Langebro and the Knippelsbro, which replaced the wooden drawbridge built by Christian IV.
Ferry-boats plied between the landingplaces of the gates, and a movable drawbridge (30 ft.
A railway drawbridge and a traffic bridge across the river connect the city with Perth Amboy.