Galahad frowns. He knew that Lan Wangji had lost some memories, because they all have, because that is what Aornis does, but this is different: by Claudius' own telling admission, the lines Galahad can read behind because he knows their shape so well, this is significant. Lan Wangji doesn't like people to know this. It's a vulnerability he had to hear for himself from Lan Wangji.

He unhooks the clasp of his watch and holds it out to Lan Wangji. "Here. You will know if you lose time."