The steam locomotives also created a permanent fog below ground.
The underground railway carried 9.5 million passengers in the first 12 months.
The oldest London Underground station, Aldgate, in East London, was built on a "plague pit’.
Bubonic plague swept through the City of London between 1664 and 1666, and one fifth of London's inhabitants are believed to have died, making it one of the deadliest pandemics.
The Underground network, nicknamed the “Tube", has grown to 272 stations and 11 lines travelling into the suburbs and beyond.
Baker Street station has expanded and today has more platforms than any other London Underground station. But the original pair of 1863 platforms remain in use, and though updated, are well-preserved.
An inspection of the Metropolitan Railway underground, London, by engineers in May 1862, before it opened to the public |