Experts believe that the "exceptional" treasure trove could lead to more discoveries in the area. The front and back of a gold coin from the ancient Roman empire. The front shows Augustus Caesar and the back shows his grandson on a horse. One of the gold coins from the Roman empire found in the English countryside. Augustus Caesar is featured on the front, and his grandson Gaius on horseback is depicted on the back. (Image credit: Two of the 11 gold coins from the Roman empire found in the English countryside. Photo by Adrian Marsden) A cache of gold coins...