It seems the more reliable (and historical) way of ascertaining one's area is through Parish boundaries vs. those of Borough Wards (to be researched another time). Below I present the current boundaries of Sydenham and Forest Hill based on the Parish system:
View Parish map...
The parishes represents the area you live in, folks; study them carefully! Yes, London Road and Forest Hill station IS IN SYDENHAM! You better belive it, folks; I don't want any arguements about it. WE OWN FOREST HILL!

Anyway, it seems a lot has changed since the parish of Lewisham, St Mary the Virgin, was created in ancient times. I was a bit shocked to discover the shape of the above boundaries. I expected Sydenham Avenue to be in Beckenham. I expected Sydenham Rise to be in Dulwich based on the old boundary between Surrey and Kent (read more about it in the Town History forum). Several parishes have merged together, including Christ Church, St Paul and St George, causing Forest Hill to grow in the Catford direction. Was the hamlet of Honor Oak Park given a church (St Augustine) before having to give it back again to Forest Hill? Let's take a look, from the beginning, at the events that divided the mother Parish of Lewisham into it's associated daughter parishes, and how they've changed shape over the years:

Unfortunately I have no records describing what happened after 1910 or where the dividing lines were chosen at each stage of Parish formation/alteration. The research continues...
After taking into account 21st century changes, do you believe the boundaries should end up forming the same shapes seen in the above Parish map, or could there be inaccuracies in the current boundaries presented?