The Local Studies Centre has over 10,000 photographs and postcards dating from circa 1900, as well as a small collection of paintings and illustrations from the 19th century. Hundreds can now be viewed at: https://boroughphotos.org/barnet.
For more information:
Local Studies Centre
Hendon Library, The Burroughs, London NW4 4BQ
Tel: 020 8359 3960