BOBBY BENSON IN THE TUNNEL OF GOLD or The Secret of Nugget Creek -- The cattle herd destroyed by a storm, all that could save their livelihood was the lost gold of the Ancients. BOBBY BENSON AND THE LOST HERD or The Mystery of Magic Mountain -- Cattle were missing. Rustlers were stealing from the H-Bar-O Ranch. But the cattle have disappeared from the earth. Did Magic Mountain hold the answer?