The darkness, always deep twenty yards before us, prevented us from estimating the length of the gallery; and I was beginning to think it must be endless, when suddenly at six o'clock a wall very unexpectedly stood before us. Right or left, top or bottom, there was no road farther; we were at the end of a blind alley.
Las profundas tinieblas que a veinte pasos reinaban no permitían apreciar la longitud de la galería, y ya empezaba yo a creer que era interminable, cuando, de repente, a las seis, tropezamos con un muro que nos cerraba el camino.