A draughting crawl that continues low ahead. (The crawl on the left hasn't been pushed?)
There is a sketch in the 2010 summer logbook (August 13th) which shows the 2 entrances to sites 2016 and 2298. Presumably 2016 links to 2298.
Reference: anon., 2005b (Easter & summer)
Detailed Survey : sketches - plan & elevation
On area survey: