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Ta, that's sooooooo much help :-)

Hey, we each do what we can... :-)

Ok, in a spirit of helpfullness (it must be the heat!), the following may be of interest:
http://scienceworld.wolfram.com/astronomy/MetonicCycle.html
http://www.mythicalireland.com/astronomy/moonmovements/metoniccycle.html
http://www.12x30.net/metonic.html

Google brings up over 200 hits!