Here is a Davis & Cook level that I came across today.
(http://farm7.static.flickr.com/6139/5971279649_b00557b63e.jpg) (http://www.flickr.com/photos/38228545@N03/5971279649/)
. (http://www.flickr.com/photos/38228545@N03/5971279649/) by radguy1 (http://www.flickr.com/people/38228545@N03/), on Flickr
(http://farm7.static.flickr.com/6015/5971280171_54e2f85bba.jpg) (http://www.flickr.com/photos/38228545@N03/5971280171/)
. (http://www.flickr.com/photos/38228545@N03/5971280171/) by radguy1 (http://www.flickr.com/people/38228545@N03/), on Flickr
Dan
One end looks to have been tortured.
Jim