Port Cities
A dock is an area of water by a wharf, where ships stop to load and unload their cargoes. The docks along the Thames are man-made. By 1800 there were so many ships using the river, there was not room for them all to stop in the river. The first docks were dug on the Isle of Dogs, the land north of the river opposite Greenwich. Thousands of people from the south side of the river worked here, loading and unloading ships.