In 1887, John Bartholomew's Gazetteer of the British Isles described Northam like this:
Northam, eccl. dist. and ry. sta., Southampton St Mary par., Hants, within Southampton borough, pop. 4178; P.O., T.O.
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 Northam has changed, please see our redistricted information for the modern district of Southampton. More detailed statistical data are available under Units and statistics, which includes both administrative units covering Northam and units named after it.
GB Historical GIS / University of Portsmouth, History of Northam, in Southampton and Hampshire | Map and description, A Vision of Britain through Time.
Date accessed: 19th April 2014
Click here for more detailed advice on finding places within A Vision of Britain through Time, and maybe some references to other places called "Northam".