oh man, that's cool. last time i lost my keys, the only thing i found was my keys...after 20 minutes and lots of profanity.
So much of this information is wrong... Also, the coin picture is either very bad or of a fake, as it looks copper [not dirt] and should be silver. This is an example of someone who doesn't know what they are talking about trying to be an expert. These coins are found with some frequency in England. Possibly correct, but (if I remember correctly) you CAN'T tell the difference between Pennies, half-Groats and Groats [if not more denominations] through pictures... A Groat would be Dollar size, a half-Groat nickel sized... Nope... just nope.
Interesting coin, awful article about it! Does appear to be a Henry VI groat, but I can't work out why the picture makes it appear copper. The coroner's inquest would have confirmed its authenticity so it must just be a bad picture. Coins like this are not uncommon over here - nor are most of the other things described in the article. I suspect the "expert" had opened the wrong orifice before starting to speak!
Some more info, and a grayscale image of the coins, is here: http://www.dailypost.co.uk/news/north-wales-news/ancient-items-found-treasure-hunters-5325813 (A link to that article is buried somewhere in the Yahoo story ...) Christian