Some will have heard of them some not. There may well be an easier youtube video on them, but occasionally the old fashioned skill of reading needs exercising, and the time it takes accepted and enjoyed. It is a skill which needs practicing.
This is undoubtedly in my classification of an interesting article jam packed with information and interspersed with pictures, on a subject I know little about. Its title is
The story of Stephenson's vaults at Camden Come hell or high water
I have read it. but not in an in-depth sort of way. I was searching for "the gist", trying to visualise the story the words were telling and indeed the architecture of the vaults and the infrastructure required to make the system work, and what remains of it today. A re-read may be necessary, I didn't get it first time. Reading is becoming a lost art in the visual and moving pictures, short attention span 2020's.
It's here for the readers...
Neil