Nostalgia for people, cultures, everything. There's an ability to use these marks to note things that are erased, deleted. Traces are a species of history, of evidence. It's a way for the way the narrator to construct a semblance of self, even though all of this creates a deception, a way to think of one's traces as a real way to define oneself. The trace is fallible, impermanent. It's one of the motives I had in mind throughout the text.