One Comes, Unheralded, to Zirta

This is, according to Ed Greenwood, the very first tale of the Forgotten Realms, written in 1967.

Summary
The merchant Mirt and the warrior Durnan checks in at the inn called "Banshee laid bare" but fails to do so in a mild manner. When the great tavern brawl turned lethal is over, several surprising visitors are revealed. They have all come there in act and meaning of planning deeds in secret or to reveal such plans; or as the saying goes, "One comes, unheralded, to Zirta".