Brilliant find by Subterranean Greenwich and Kent – an old document precisely defining where the caves are beneath Blackheath.
Here’s the full text from the scans, OCR’d using Google Docs, then tidied up by me (apologies for any typos):
On June 29th, 1946, a large number of members of the Society availed themselves of a unique opportunity of inspecting the Blackheath Cavern. The advisability of closing the shaft, excavated in 1940 with the object of re-discovering the Cavern, had been under discussion by the Greenwich Borough Council, and it had been decided that the time had arrived for this to be done. A final inspection by members of the Council had been arranged, Continue reading