So after I finished the Cent story arc I had a letter waiting in the letter box in my settlement. I read it but don't remember the content. I then rested in bed (as was required by the mission) and when I woke up another letter was in the box (a different one , something from bishop Deorlaf). It seems that in both letters the NPC was expecting to see me at their location. However I don't remember the content of these letters and they are not in my inventory. I don't have new quests from them either.
Is it normal ? Is there any way to re read the letters in order to know what to do/where to go ? Or was it only for lore but nothing is supposed to happen if I meet these NPCs?