Keys of Orthanc

The keys to Orthanc, were literally keys, being described as:

"Two great black keys of an intricate shape, joined by a ring of steel."

At one point during the book of the Two Towers, Gandalf said to Saruman that if he handed over the keys to Orthanc, and his staff; in time he may be pardoned, and get them both back. (So Isengard and his staff can be put to no urther evil, Saruman does not however surrender them to Gandalf, and eventually does surrender them to Fangorn (Treebeard); who possibly gives them to Aragorn. (But is unknown); but even so apparently Gondor had no use for Orthanc, and the keys may been kept by the lord of Gondor. Or the ents who were bidden to dwelt there.

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