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Inside the Labyrinth


Today, much of Williamson’s labyrinth is inaccessible, either through being filled with rubble or through being bricked up. For the moment therefore, the only impression we can gain of some parts of the system comes from anecdotal evidence. Here, then, we bring together some of the more descriptive quotes from the writings of the two historians whose works have fed most contemporary accounts of the Williamson tunnels.

Firstly, Charles Hand describes the tunnels under Paddington as he saw them in 1916: “
..... we descended with infinite care the stone steps leading into the very bowels of the earth. At the bottom of the first flight, an archway cut out of the moist and musty rock led away to the right, and the next flight branched away on either hand, giving access to low tunnels and more steps down ..... We groped our way carefully along the accessible ramifications of these crypts to the depth of three storeys below the street level. There are three or more storeys below these - the basement is said to be as deep as the buildings are high ..... We failed to discover a boundary. We were in a nightmare maze of constructed tunnels and caves. Nobody knows their extent.” and then the structures under Williamson’s house:They are grotesque beyond description; words fail to give an adequate idea of their appearance. Dungeons carved out of the solid rock, with no light and no ventilation, the only access being through a heavy wooden door, vaults with a roof of four arches meeting in the centre in a manner that present-day builders would not think of attempting; monstrous wine bins with many stone partitions for enormous quantities of bottles; massive erections of masonry and stone benches - all apparently without the slightest objective or motive.

Stonehouse describes the system under the Grinfield Street area as he witnessed in 1845:In one section of the ground (that near Grinfield-street), where there was of late years a joiner’s shop, the ground was completely undermined in galleries and passages, one over the other, constituting a labyrinth of the most intricate design. Near here also was a deep gulf, in the wall sides of which were two houses completely excavated out of the solid rock, each having four rooms of tolerable dimensions.” and then some of the structures behind the houses midway along Mason Street:There is a vault in the southern wall opposite the wall just described. It runs towards Grinfield-street, and is composed of two large arches side by side, surmounted by two smaller ones. In the eastern face of the quarry there is an immense arch perhaps sixty feet high; and about thirty feet from its entrance there is an immense and massive stone pier from which spring two arches on each side, one above the other, but not from the same level. The pier is hollowed on the inside by three arches. On the left hand wall inside the arch there are two large arches, from which vaults run northwardly, and on the right hand side of the wall there are also two vaults which extend to a great distance in a southwardly direction, towards Grinfield-street. From these vaults, other vaults branch off in all sorts of directions. The houses in Mason-street all rest upon these arches; and as you passed along the street, the depth of some of them at one time was visible through the grids.

Finally, to replace a thousand words, here is a rough sketch from Stonehouse’s original 1846 manuscript of one of the caverns he saw shortly after Williamson’s death. Stonehouse’s writing at the side points to “An immense square pillar supporting the upper part of the arches” and he has included two figures near the bottom left to give an idea of the scale. There are records describing many such features, a number of them cut into the sandstone ‘cliff’ behind Mason Street. Some of the tunnels started as brick vaults built on top of empty land to provide a raised ground level for rear gardens for the Mason Street houses.
However, Williamson usually continued onwards into the sandstone itself, under the houses and beyond.