The Knights Map

I came across this interesting puzzle within the pages of Historia Regum Britanniae. It’s an ancient map that King Arthur’s Knights used to locate buried gold coins. Where a runic number is etched in a square, it indicates how many coins are located in the squares surrounding that square. There is only one coin in each individual square and a coin cannot be buried in a numbered square. Mark the locations of all 25 of the coins, one has been included to start you off.