The list author says: "In 1837 Queen Victoria took the throne after the death of her uncle William IV. She died in 1901.
The early Victorian(including the Romantic period) covers the years from 1837 to about 1850. Mid-Victorian period goes from 1850 to about 1885 and then her last years are know as late Victorian. These are somewhat arbitrarily defined periods but serve as a division to better study her long reign."