Gandalf a "steward?"

Originally Posted by narfforc

Gandalf had been around since about TA1000, what other type of being could live over two thousand years, he was quite clearly not an elf, and Denethor was not stupid, Saruman had been given the keys to Orthanc by Beren in 2759, there must have been suspicion as to the nature of these beings and their mission.

I also think Denethor wasn't stupid but it was 250 years ago when Saruman had been given the keys of orthanc and he a lot of other problems then thinking "what are the wizards?"
None knew who they were except the three keepers of the elven-rings.
litle question did Sauron knew who they istari were?