Considering how early it came in the horror cycle, it is surprising how restrained and unsensational The Mummy is. On the other hand it is that very restraint that helps to make it a classic. If one accepts The Bride of Frankenstein for its theatre and The Body Snatcher for its literacy, then one must regard The Mummy as the closest that Hollywood ever came to creating a poem out of horror. -- William K. Everson, Classics of the Horror Film
When Helen arrives at the closed museum, both Frank and his father, Sir Joseph, are about to drive off.They watch her as she tries to open the front door, and Frank is soon within arm's reach when she swoons. He sweeps her up in his arms and they take her to their apartment, where Dr. Muller arrives moments later. As Sir Joseph and Dr. Muller discuss the matter, Ardath Bey, still at the museum intoning his spell, is interrupted by a guard and extinguishes the small oil lamp he used to read the scroll. A circle of light from the guard's flashlight searches the room and finds Bey crouching in a corner. The guard turns on the lights and starts yelling at Bey, who, with complete calm, walks away. Chasing after him, both the guard and Bey go off screen. The guard's voice drops to a stifled gurgle as he's murdered, although no sign of harm can be found on his body later. In the tussle, Bey drops the scroll. Leaving Helen and Frank at the apartment, Sir Joseph and Dr. Muller go to the museum after they receive a phone call alerting them to the murder, and discover that the scroll, lost then years ago, is now in their hands. They return to the apartment with it, and, along with Frank, retreat to Sir Joseph's study to discuss what it all means.