The Film Mystery

"Camera!" Kennedy and I had been hastily summoned from his laboratory in the city by District-Attorney Mackay, and now stood in the luxurious, ornate library in the country home of Emery Phelps, the banker, at Tarrytown. "Camera!-you know the call when the director is ready to shoot a scene of a picture?-well-at the moment it was given and the first and second camera men began to grind-she crumpled-sank to the floor-unconscious!"