Secret water-ways

I have been following the stream that flows under a bridge on the path leading to the Southwest (?) entry of Southampton Common. It starts as an outflow from the fishing pond. Then I wanders, turning to the left into the wood ahead, until it emerges through the bridge. Again plunging into the woods, it skirts the bird sanctuary pond and enters a pipe carrying under another path, emerging into a gully running along the wall of the cemetery. By this time there was no sign of water, having seeped into the ground some time ago. But I would guess that it continued back under the same path, where there was another bridge, and entered the rich reed beds that formed the core of the woods abutting Cemetery Road.