Why is a diver needed at a cathedral?? I’ve got to look this up… Wow, this is quite the story; the cathedral was built on peaty soil with a high water table, so natural subsidence over time lead to damage. William Wallace, the diver, spent *6 years* placing concrete under the cathedral, in the dark, by hand. In that suit.
I vaguely recall hearing about this story. What a horrible job to do, and for so long. From Wikipedia: Waterlogged foundations on the south and east walls were reinforced by diver William Walker, packing the foundations with more than 25,000 bags of concrete, 115,000 concrete blocks, and 900,000 bricks. Walker worked six hours a day from 1906 to 1912 in total darkness at depths up to 6 metres (20 ft), and is credited with saving the cathedral from total collapse.
MATTHEW'S ISLAND 
Why is a diver needed at a cathedral?? I’ve got to look this up… Wow, this is quite the story; the cathedral was built on peaty soil with a high water table, so natural subsidence over time lead to damage. William Wallace, the diver, spent *6 years* placing concrete under the cathedral, in the dark, by hand. In that suit.
I vaguely recall hearing about this story. What a horrible job to do, and for so long. From Wikipedia: Waterlogged foundations on the south and east walls were reinforced by diver William Walker, packing the foundations with more than 25,000 bags of concrete, 115,000 concrete blocks, and 900,000 bricks. Walker worked six hours a day from 1906 to 1912 in total darkness at depths up to 6 metres (20 ft), and is credited with saving the cathedral from total collapse.