Perry Austin Armstrong (1823-1904) was a lawyer, politician, statesman, and historian residing in Morris, Grundy County, Illinois. He had a strong interest in Native American history within that state, writing several books on their history and traditions. The Piasa is his research into strange petroglyphs along the Mississippi River depicting monstrous creatures. Это и многое другое вы найдете в книге BioFortean Reprint (Perry Austin Armstrong)