Direct answer
Objectives follow journal display order. Some depend on your choices; follow the active objective in the game.
Result
As it turned out, Geralt was not alone in searching White Orchard for a lost loved one. The witcher also found the notice of a peasant who was seeking his brother. The brother had left home to take up arms against Nilfgaard. The forces of the North and the Black Ones had then clashed in a great battle near the brothers' home village, and the peasant had not heard from his sibling since.
