After the floor, the walls were examined, one by one, from floor to ceiling. The panel on the inner wall, which had baffled both Mildred and Runyon on that eventful night of their imprisonment, suddenly disclosed its secret when accidentally pressed on opposite corners at the same time. It slipped down and discovered a similar panel beyond it, which was operated by a spring placed in plain sight. Releasing this, they found they were looking into the vacant second story room which they had once before unsuccessfully searched.