The adventuring guild was called
Ansur's Finest. Hence I thought it has something to do with the Dragon?
Concerning the letters, you probably mean the
Soft Letter? I remember with the release version, a dead male Flaming Fist can be found in Waukeen's Rest with a similar letter, but I don't know if there's a connection or if the letter independently belongs to the dead Flaming Fist's wife (i.e. another person) in Baldur's Gate.