Andy,
Yes, the one in the W/f's book. Certainly not you're piece, which I tend to think is much younger.
Similarities in books are all very well, but you mustn't go down the route of thinking something similar is the same. Whilst it may be, it is far more likely, in my experience, that it will turn out wrong. It's all part of the fun of the search - and building up a working knowledge.
Cheers, Nigel