Updated 8th May 2018
The site is just out of the green field containing cave 1603. A brambly hole that appears about 4m deep and needs better investigation. Burnt off vegetation allowed a better look in April 2018, but it appears choked. Site 4733 is a similar hole a few metres to the south.
Reference: anon., 2000d (Christmas logbook); anon., 2018b (Easter logbook)
Entrance picture: 2000 and 2018
On area survey: