Passing this on from another list: Just passing on a great website I discovered - you can use it to browse on-line or buy historic maps of London, UK, which can help make sense of census addresses etc. Includes some historic Ordinance Survey maps (very detailed, often note farm names etc). Enter 'maps' + the area you are searching for. eg map islington gave me 16 hits. Hope it's useful. http://collage.nhil.com/categories/history.html