Thanks, Bill, but the one I saw in the Bate's book was different than the ones that I see on other web sites. The one I saw used a treble hook, some monofilament, and bucktail or other fur tied to a tube. There are two tubes on the mono that slide up and down and there is a loop in one end of the mono (sort of like the old eagle claw snelled hooks).

This contraption doesn't look like the one's I find on the web and I've looked at all the other posts here and on other sites.
dc