Updated 26th September 2012
A sink at the end of a dry valley that takes a lot of water in wet weather. Choked with mud and branches with a "plug hole". The position was thought to be incorrect in 2012 but that would place it on the other side of a building. It is possible that this has been covered over. (See site 3727).
Reference: anon., 2002b (summer logbook); Corrin Juan, 2003b; anon., 2012d (summer logbook)
On area survey: