Justine? Text Behind Stairs? Letter In Glass Case?

[Tanshaydar]

1. There are notes that 'letters between Herbert & Justine's father' and one from Daniel. Yo know who Herbert is? I hope you are the type of the player who reads and explores everything in game before starting to ask questions.

2. I don't understand any word of it. I need a simple and plain explanation. This is in Justine DLC?

3. If it's not pickable then it's not readable, then it's not important, simply does not contain any word.