Has anyone made an effort to identify all of the letters Verin distributed and speculate as to their contents?

I believe we've seen letters with red-wax seals that seem likely to have come from Verin in the possession of:

1. Mat (we now know the contents);
2. Galad (may have caused him to look "troubled" );
3. Rand (from Tiana); and
4. Alanna (envelope found after her unexplained departure).

Any theories out there as to what these letters state? Did I miss any other letters that the books reveal?