OHIO EXCAVATIONS REVEAL MOUND BUILDERS' MODES OF LIFE. State Historical Society Discovers a City of the Strange People Surrounded by Walls and a Moat--How the Inhabitants Lived and Worked--Valuable Relics of Articles Used for Domestic Purposes, War, and Personal Adornment. DOMESTIC IMPLEMENTS OF PREHISTORIC AMERICANS. Light on Social Conditions. How Houses Were Arranged. Antedates Discovery of America.