Whilst I was out walking the dogs last week I came across what I thought was two cachers hunting in the rhododendrons, when I confronted them with a friendly “hello, are you looking for a cache”,
They turned and lowered their hoods to reveal Lizard like heads, needless to say I took a surprised step back, but they said “Gronda, Gronda; wait, let us explain what we are doing”…
They explained that they were Rongad and Dorgan, travellers, from a small planet called Arg, A small planet of little consequence inhabited by the Argonds, a polite race, who nevertheless have a regrettable sense of humour, and enjoy testing the wit and perspicacity of any visitors...
They also explained that they had for a while some decades ago welcomed travellers from Earth to play certain challenging games,
But now they were visiting earth as part of an intergalactic scavenger hunt similar to our game of geocaching and were searching for a clue. The hint for the whereabouts for the clue had been set using Earth money to calculate the coordinates.
I helped them find the clue which was a box, and they were very grateful so much so that they gave me some of their currency and said that I could use the clue box for a cache.
So if you can work out the value of each piece of Argonds currency, a hint they also left was “Richard of York gave Battle”
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You can validate your puzzle solution with certitude.