La grotta sacra

“Lancaster Tonawanda.” Lieutenant Wales' last words are a puzzle to Mark, but not to their recipient, Colonel Foster. The city of Lancaster, in Tonawanda, is the place where the English hold Logan prisoner, a hunter who luck has put on the trail of a very rich deposit and bad luck in the hands of the English. That gold is too important, even vital to the American cause! The hunter must be freed before he speaks, and no one is better suited for this risky mission than Mark. But Logan's gold risks turning the whole of Ontario red, since no one seems to notice the fact that the deposit is located inside a sacred Seneca cave...