What does the Traveler discover when he returns to the White Sphinx? Why do the morlocks almost capture him?

The TT naps, then heads down to the White Sphinx. He is surprised to find the bronze pedestal has been opened, and the Time Machine is inside, cleaned and oiled. He throws away his weapon and goes inside. Suddenly, the bronze panels close up, and the TT is trapped. The Morlocks laugh as they approach him. The TT feels safe, knowing he has only to reattach the levers on the machine to make his exit. However, his matches require a box to light. In the darkness, he fights them as he gets into the machine's saddle and reattaches the levers. Finally, he pulls a lever and disappears.