[It's what he'd suspected, that the other man would somewhat underestimate, that they'd turn out to be closer in age than Geralt suspected. He's half right anyway, but the number the other man gives him has Julian's eyebrows inching further towards his hairline in overt surprise.]

Oh, well. You are well-preserved. I'd never have guessed.

[And whilst he's usually good at discerning jocular tones, it bypasses him, on this occasion.]

I just assumed it was always that colour. My two magician friends have white hair, and both are younger than I am.