The Millwall Dock Company's resident engineer, Frederick Duckham, invented the first pneumatic system for moving grain from ship to shore.
At first he used a barge and then a gigantic granary that could hold 24,000 tons. The McDougall's flour mill was built on the site of the original granary, which burnt down.
Meanwhile, the London and St Katharine Dock Companies had combined and bought the Royal Victoria Dock. In 1874 the new company decided to build the Royal Albert Dock in North Woolwich as an extension of the Victoria.
This was mainly because the Victoria dock was not deep enough and had too narrow an entrance for the largest steamships.
It was connected to the Royal Victoria Dock, to the east, by a lock and was entered from the Thames via a basin at Gallions Reach. The main cargoes handled at the Royal Albert Dock were tobacco, chilled and frozen meat, grain and general cargo.
There were single storey transit sheds rather than warehouses, to emphasise the fast turn around for ships. It was also the first London dock to be lit by electricity.
The Royal Albert Dock was at first used at the expense of the other docks in the port. This provoked the East and West India Docks Company (the two amalgamated in 1833) to build the Tilbury Dock.
It was situated more than 40 kilometres (25 miles) downriver from London.
The company hoped that ship-owners would prefer to dock their vessels close to Gravesend, the well-established point of arrival for ships, as it would save them the time and expense of taking the ships further up the river.
The dock opened in 1886 but shipping was slow to transfer from the older docks. This was largely because of a boycott by London merchants, lightermen and wharfingers (wharf owners).