In 1887, John Bartholomew's Gazetteer of the British Isles described West Hampstead like this:
West Hampstead, ry. sta., Hampstead par., Middlesex, in N. of London, 2¼ miles NW. of Baker Street Station.
The location is that marked as "West Hampstead" on the modern 1:25,000 map. Additional information about this locality is available for Hampstead
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 West Hampstead has changed, please see our redistricted information for the modern district of Camden. More detailed statistical data are available under Units and statistics, which includes both administrative units covering West Hampstead and units named after it.
GB Historical GIS / University of Portsmouth, History of West Hampstead, in Camden and Middlesex | Map and description, A Vision of Britain through Time.
Date accessed: 29th March 2015
Click here for more detailed advice on finding places within A Vision of Britain through Time, and maybe some references to other places called "West Hampstead".