Mistborn series book 3, The Hero of Ages, end of chapter 10, as Vin leaves Sazed:
She left him alone in the tent. A few moments later, he returned to his shaving, and found something sitting beside his basin. A small, folded piece of paper.
It contained an aged, fading drawing of a strange plant. A flower. The picture had once belonged to Mare. It had gone from her to Kelsier, and from him to Vin.
Sazed picked it up, wondering what Vin intended to say by leaving him the picture. Finally, he folded it up and slipped it into his sleeve, then returned to his shaving.
I can't figure out what Vin's intention is either. I assume there is some intention, since the text explicitly calls this moment out as having an intention. So, what did Vin intend to say by leaving the picture?