Our dig that was trashed was in the chamber between the 4th and 5th water caverns. Its on the right as you enter from the 5th water cavern and was heading under the floor of the 4th water cavern. Doug Nash dug there in the 1950's and I continued it after reopening the adit and putting in the oil drum entrance in the early 1980's.
I was also gigging at the back of the 5th water cavern which is when our tools were stolen. this was in the base of a pitch the back right hand corner which still has potential.
I m of the opinion that much of the old mans workings were below the currently known system,