Bateman Island, about 300 miles from the Pacific, was the farthest Lewis & Clark traveled upstream on this river

What is referred to by 'film legend issur danielovitch'? What is referred to by 'save slag nevada'? Based on the clue 'lagos ibadan ogbomosho are the largest cities of this west african nation', what is the answer? What is associated with: four years after gold was found at his mill on january 24 1848 he was bankrupt? Deion Sanders knows this term for the evening hours when the largest audience is available for TV Airplanes are on this just before they land Girls' No. 7: de Havilland, Newton-John (I really can't think of another Newton-John, can you?) Tom Drake in Words and Music (Hint: Mickey Rooney played his partner Lorenz Hart)