Direct answer
Objectives follow journal display order. Some depend on your choices; follow the active objective in the game.
Result
At Crow Perch Geralt took on a contract to kill a beast attacking merchants journeying to the Baron's estate. The witcher spoke with witnesses and learned all the monster's victims had their throats torn open and were partially eaten. The only man to survive an attack by the beast claimed the monster came from Crookback Bog.