None could open her Magic Coffer without the lamps, for we know now that ordinary light will not be effective.
The great lid of the sarcophagus was not sealed down as usual, because she wished to control the air.

But she hid the lamps, which in structure belong to the Magic Coffer, in a place where none could find them, except by following the secret guidance which she had prepared for only the eyes of wisdom.

And even here she had guarded against chance discovery, by preparing a bolt of death for the unwary discoverer.

To do this she had applied the lesson of the tradition of the avenging guard of the treasures of the pyramid, built by her great predecessor of the Fourth Dynasty of the throne of Egypt.
"You have noted, I suppose, how there were, in the case of her tomb, certain deviations from the usual rules.

For instance, the shaft of the Mummy Pit, which is usually filled up solid with stones and rubbish, was left open.