In 1870-72, John Marius Wilson's Imperial Gazetteer of England and Wales described Longbridge like this:
LONGBRIDGE, a hundred in the rape of Pevensey, Sussex; containing Arlington parish, and four other parishes. Acres, 10,440. Pop. in 1851,1,353. Houses, 256.
A Vision of Britain through Time includes a large library of local statistics for administrative units. For the best overall sense of how the area containing Longbridge has changed, please see our redistricted information for the modern district of Wealden. More detailed statistical data are available under Units and statistics, which includes both administrative units covering Longbridge and units named after it.
GB Historical GIS / University of Portsmouth, History of Longbridge, in Wealden and Sussex | Map and description, A Vision of Britain through Time.
Date accessed: 10th December 2013
Click here for more detailed advice on finding places within A Vision of Britain through Time, and maybe some references to other places called "Longbridge".