Quotation from: Out of Time's Abyss

Written by: Edgar Rice Burroughs

For an instant the thing hesitated, and then it grumbled "Yes."
At the same instant Bradley saw two hides upon the wall directly
back of the dais separate and a face appear in the opening.
No change of expression upon the Englishman's countenance betrayed
that he had seen aught to surprise him, though surprised he was
for the face in the aperture was that of the girl he had but just
left hidden beneath the hides in another chamber. A white and
shapely arm now pushed past the face into the room, and in the
hand, tightly clutched, was the curved blade, smeared with blood,
that Bradley had dropped beneath the hides at the moment he had
been discovered and drawn from his concealment.