Interesting, but not what I was looking for. I was looking for evidence (In Europe, this "tunnel story" came up unexpectedly)of more ancient, centuries odl, tunnels. I am a dowser and for the past decade I have been tracking by dowsing secret underground tunnels that I believe were constructed by the ancient Roman Catholic Church in the C11th or C12th as a means of escape from Danish raiders. These tunnels exist wherever the old Catholic Church had a serong foothold. My experiences shows that ALL pre- C18th Halls, Granges and Manor Houses have such tunnels leading to their stables and beyond to the next property which convinces me that horses, or at least small ponies akin to our small pit ponies, were used in these tunnels. The tunnels are ALL a uniform size, 5 of my paces wide, roughly 8 feet, and likely the same in height. As you might imagine, these tunnels are of decidedly more interest than any modern access tunnels which are themselves very common. Regards, Jeff, Newcastle upon Tyne England.