With Brockers, Jake, Jon, Duncan, and Mike turned up later in the morning.
Me and Brocker digging, alternating the loosening sediment/filling bags, and hauling the spoil up to the ledge. Jake was on the ledge, catching the bucket and transferring its contents to the skip to be hauled away by Duncan, at the bottom of the entrance, Jon was on the surface, joined later in the morning, by Mike.
About 100 bags were filled, hauled, and emptied along with several loads of rock being added to the wall building stockpile. The weather was glorious, but it was still surprisingly damp and soggy underground. The dimensions of the sediment choked passage being followed have not diminished.