It's a small notebook... when she opens it, she finds it's a leather-bound ledger.
Records of past trips and the notes made. They date back, in different scripts - apparently freeholders past have followed this same custom for generations. An old alliance between Silverwolf and the 'Lords of Wolf Lake'. Indeed, the map directs to Wolf Lake State Forest. The closest edge is not incredibly far just over ~50 miles north. An hour or so drive - or a day's ride, perhaps half day, on a swift Fae steed.
It holds records of the Baron's annual Solstice trips, the amount and flavor of dross used, a map that designates his drop locations.
And, the following notes, outlined in specific. There is more, but it would take quite some time and study to go over the entire book.
Do not drive any vehicle past the county road, (Indicated on the map) nor ride any mortal steed. Even Fae blooded may flee.
TAKE NO SILVER. (this point, underlined)
Do not hunt on, or within the reasonable boundaries of their land.
Leave nothing other than the tribute. Take nothing other than what is left in return.
Respect their ranking and give no offense. If trouble, ask for Terra Half-Moon.
Anger not the children of the wolf.