Part II: Revisiting the "Virgin" Site of Swedish Tavern, page 51
Metal Detecting Old Copper Coins
...Soon another coin signal came in, and I unearthed a copper coin.
The coin was of the same size as the previous coin and had similar displaced design visible through dirt.
1/6 Öre
Because over 100 million "halvörings" were coined, and no "fyrks" - 1/4 Öre coins, were issued during the reign of Charles XI (see details on page 14), the 1/6 Öre is the most common coin find at the sites of Swedish taverns that operated during that period.
Now it was obvious to me that I had discovered a "hot pocket" at this site, and the copper coins were turning up one by one. But what about the silver coins?
I was just about to start thinking about the process of materialization of thought, when Irina called me over. By the tone of her voice, I knew she was excited about something (a coin signal?) and wanted me to take a picture of recovery process. By the time I got out of the trance state of mind and reached her, she has already held a dug coin in her hands.
Brushing Dirt Off the Coin