And yet, through all these obstacles, an invisible channel seemed open for the spectre, which pursued its way unchecked.
Each time it passed before a window, the light from with out, feeble as it was, shone upon the winding-sheet and the ghost, outlining the figure, which passed into the obscurity to reappear and vanish again at each succeeding one, Roland, his eyes fixed upon the figure, fearing to lose sight of it if he diverted his gaze from it, dared not look at the path, apparently so easy to the spectre, yet bristling with obstacles for him.

He stumbled at every step.

The ghost was gaining upon him.

It reached the door opposite to that by which it had entered.

Roland saw the entrance to a dark passage.