That's another tributary of the Lee or Lea checked off. Today's little jaunt was Ware -> Potters Bar -> Source of the Turkey Brook -> Enfield Lock -> Ware. So that's both the Turkey Brook and Cuffley Brook from source to where they join the Lee or Lea.
http://en.wikipedia.org/wiki/Turkey_Brook says it's named after Turkey Street or TokeStreet which is a street owned by a family called Toke(y) and nothing to do with Turkeys at all, at all.
Pond Wood just SE of Potters Bar is worth a visit. https://www.google.co.uk/maps?ll=51.688997,-0.152129&spn=0.018224,0.045447&t=m&dg=opt&z=15
There's a large pond and marshy area fitted out with white topped poles and duckboards to walk around it. Today it was full of wild life like Dragonflies.