That's not what he was looking for. Heine lets Jade close that door in his memories, but makes a note of the location. He goes around it. But in trying to follow the path of frustration, he finds something else.

Older memories. Heine hesitates over them, not wanting to look into ones that aren't relevant, but in that hesitation bits and pieces wash over him. It's too hard to make sense of them without context, but he gets a feeling of it before he steps away again and reminds both himself and Jade, Professor Eichel.