My mother worked at Christ Church (Oxford University) and she was the first to bring the Trill Mill Stream to my attention. Pictured here the stream appears deep and slow – coming from under the University into Christ Church Meadow.
At one time the stream actually flowed on the surface, but it was eventually buried. The high walls within which the stream is channeled (just before it reaches the Thames – or the Isis as they call it in Oxford) is because in the 1800s the vapors coming off the water were blamed for causing a cholera epidemic- hence the idea to contain it. Initial exploration of the stream in the 1920s revealed a rotting Victorian punt wedged somewhere within and populated by 3 human skeletons.
Numerous people have traversed this underground waterway, Lawrence of Arabia did it in a canoe and one enterprising adventurer used a sea plane float. Modern urban explorers record their adventure and reveal an arched roof of bricks, the undersides of numerous manhole covers and a passage that makes at least 6 90 degree turns – finally ending in an iron gate – as seen from the outside it is this incredibly archaic industrial age contraption – a plate of metal that is raised and lowered by a wheel.
In Ronald Knox’s book, “The Hidden Stream; the Mysteries of the Christian Faith” he mentions Trill Mill Stream in his introduction in saying that, “if you know the right turning close by the gas works you may thrust your canoe up to the mill-pool under the castle walls where an entrance hardly more dignified than that of a sewer invites you to leave the noise of Oxford behind, and float down through the darkness.”
If I still lived in Oxford, I would certainly have been one of the explorers. I had at one time entertained the idea of using an air mattress. Now that I live in Canada the gloomy tunnels under Guelph will have to suffice – sadly they do not have the history of the Trill mill stream.