Yes, please, my cat would like to participate. I do have a possible angle here. As Piosenniel and Child of the 7th Age know from the Inn, Tevildo is under the illusion that he was once a member of Melkor's household, charged with the gathering of meat. He has many memories from the First Age which is why he spoke with the two-leggeds in the long robes.
I personally believe that Tevildo was not a member of Melkor's following, but has "inherited dreams" in the same way that JRRT and his son did concerning Numenor and the great wave. Tevildo's ancestors (like all cats
) apparently had dealings with Melkor and can remember many things about life in the Dark Lord's household.
It is quite possible that he will be able to remember something about this wraith thing if and when he sees him. Perhaps he will remember horrible scenes in the dungeon when poor Elves were being tortured and such.
Would something like this work as one small piece in unravelling this puzzle?