Never one to miss an opportunity, here Mark Bowler, editor of Fly Fishing and Fly Tying, makes a quick phonecall in order to arrange for the special delivery of 5000 empty film canisters, so that he can bottle the Chatsworth mud and give it away as a "Secret Sinking Compound" to all magazine subscibers.

Of particular fascination is the streaky bit of mud to the top left of the sign. Now how did that get up there we wonder?