The scavenger trail
5 trails are fixed in the index — region, then state, then the county drawer. Each leg, one of four file cards answers the clue; the rest are cold trails. Last leg ends on a real dossier.
route — of 5·cold trails 0·cleared 0
four file cards — one answers the clue
You found it
The trails are fixed — same for every visitor, like a scavenger list pinned to the records-room wall. Cold trails are counted, not punished.