Latest in the series of tma-lotr parallels: the Eye of Sauron is referred to the Eye. Capitalized.

Also this: “I say to you, Frodo, that even as I speak to you, I perceive the Dark Lord and know his mind… and he gropes ever to see me and my thought. But still the door is closed!” (Galadriel, ‘The Mirror of Galadriel’, FotR, pg. 355, emphasis mine)