do a search on google and you will find a lot of material on link wheels.

not really worth doing as far as i am concerned

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Linkwheels in their original form, ie all linking to each other and the last one linking back to the first are now apparently being found by Google (no surprise really as they all pass to the next link in the chain and then confirm the manipulation by then linking back to the first!).

This is where it all started:

Linkwheel Explained