A prepubescent, barefoot peasant child runs into the Broken Dagger, clutching a note made dirty by the very fact that it is in the possession of a such a child. It's sealed with wax, and messily so, as if the child had done it himself.
"Hi," he says, the excited thing; he wriggles onto the barstool and extends the note to the bartender. "My sister tol' me I had t' give this to Elil. She tol' me to leave it with the bar if she ain't here. And she ain't here so can you give this to her? My sister says it is real, real important!!"
The bartender, of course, knowing Elil, will put it aside in a place that the surly tavern guard will see the next time she comes in for her shift.