Direct answer
Objectives follow journal display order. Some depend on your choices; follow the active objective in the game.
Result
While traversing the roads and backwoods of Toussaint, Geralt happened upon two wild rock trolls who seemed vehemently to want disembowel the witcher. As he had through his life grown attached to his entrails, he drew his sword and defeated the beasts in a spectacular struggle. While ferreting about the area where they had fought, the witcher found an interesting letter…
