 At the same time, the Citadel was extended to the west (the 'Western Outworks') with further casemated barracks provided within the new ramparts.Also at this time, following the Royal Commission of 1859, the North and South Lines were strengthened and the North-East Line rebuilt on a different alignment, more effectively closing off that end of the site between the Drop Redoubt and the cliffs.Furthermore, the North Entrance was rebuilt and strengthened (necessitated by the rebuilding of the Lines); it was approached by way of a twisting path through the tenaille and lifting and falling bridges across the ditches.