Source of the Ravensbourne

I went down to Keston ponds - just beyond Bromley - at the weekend, a nice place for a walk in its own right but of special interest to South East Londoners as the source of the River Ravensbourne.

The river starts as a trickle from a spring, Caesar's Well (pictured), gradually gaining momentum as it passes through Bromley, Catford and Lewisham before it reaches the Thames at Deptford Creek.