East lancashire dating
In the Domesday Book, land between the Ribble and Mersey were known as "Inter Ripam et Mersam" In 1889, the administrative county of Lancashire was created, covering the historic county except for the county boroughs such as Blackburn, Burnley, Barrow-in-Furness, Preston, Wigan, Liverpool and Manchester.
Liverpool and Manchester grew into its largest cities, with economies built around the docks and the cotton mills respectively.
Today the ceremonial county borders Cumbria to the north, Greater Manchester and Merseyside to the south, and North and West Yorkshire to the east; with a coastline on the Irish Sea to the west.
The county palatine boundaries remain the same as those of the pre-1974 county with Lancaster serving as the county town, and the Duke of Lancaster (ie the Queen) exercising sovereignty rights, The Countie Pallatine of Lancaster Described and Divided into Hundreds, 1610, a map of Lancashire engraved in around 1627 by John Speed.
It did not cover the western part of Todmorden, where the ancient border between Lancashire and Yorkshire passes through the middle of the town.
During the 20th century, the county became increasingly urbanised, particularly the southern part.