It needed all his will-power to control the excitement with which he was overcome. Hurriedly, with convulsive fingers, he clutched the cross and, pressing upon it, turned it as he would have turned the spokes of a wheel. The brick heaved. He redoubled his effort; it moved no further. Then, without turning, he pressed harder. He at once felt the brick give way. And, suddenly, there was the click of a bolt that is released, the sound of a lock opening and, on the right of the brick, to the width of about a yard, the wall swung round on a pivot and revealed the orifice of an underground passage.
Like a madman, Beautrelet seized the iron door in which the bricks were sealed, pulled it back, violently and closed it. Astonishment, delight, the fear of being surprised convulsed his face so as to
