You went down the Hillocks climbing shaft, along Meccano passage into Waterfall Chamber, went down the coffin level to the four-way junction at the base of Crimbo Hollow shaft, west to the base of Wyatt's shaft, then back to Waterfall chamber, up into Pearl Chamber and then out of the Knotlow climbing shaft. All the credit is due to OG and Zomjon for that trip, they did the rigging!
p.s. the Bung series apparently gets a bit less grotty after the initial bit, maybe I will give it a try next time I'm down there....
Edit - just looked at the photos, the large passage with the coffin level in the roof is part of the Hillocks side. Having said that, to my mind it's an artifical split, the whole complex is properly called the Whalf(e) pipe and it was always treated as a single entity in the 18th/19th century....
Follow the horses, Johnny my laddie, follow the horses canny lad-oh!