Happenings --<br/><br/>Wallen, to answer your question, placing a simple copper piece within the bowl will not do anything.  At the very least, Jhess-- who led you to the Underbridge -- will know that this hovel is where the Blight lives.  To draw him out, one must simply knock upon his door.  But how?  Ah, Jhess--and anyone who can succeed on a DC 16 Knowledge (Local) check-- will know that you simply have to place at least five gold pieces -- or something that's worth at least five gold pieces -- within the bowl.