minas morgul

During the last debate while debating whether to assail Minas Morgul, Gandalf talks of "evil that dwelt in the valley, where the minds of living men would turn to madness and horror" (Black Gate Opens, p 884). Is this a reference to the Nazgûl? Or some other type of evil?

In Return of the King, Aragorn says that Minas Ithil was to be destroyed. But Minas Ithil was sister city of Minas Anor. This means that it would likely have similar fortifications - and the main wall of Minas Tirith was basically indestructible. Does this mean main wall of Minas Ithil will have...

Does anyone know what beings made up the army that Frodo saw marching away to the Osgiliath?

It's been a while since I read the Two Towers, but recall that there were these sleepless watchers inside the place that weren't Nazgul but couldn't be Men either. What were they? And were they kept up by the Ring's power, thus being destroyed when it was ruined, did they die when the Tower...

and sam went to rescue him wouldnt the nazgul have sensed the ring and taken it from sam?

A bunch of questions about this fun place. There seems to be a pass, a tower, and a city: 1. What are the division of responsibilities between Shagrat's and Gorbag's lads? 2. Gorbag says: Gorbag is hardly an authority, but an interesting quote. What is he talking about? Direct...