They understand, and appreciate it. And perhaps they understand Lemm's feelings faster than Lemm does, head tilting almost imperceptibly towards the wanderer's journal and adding Thank you. I'm grateful that time is long behind me. Now I know what I am, and I've become a king and a Higher Being all in learning it. I couldn't have imagined anything like that.

They draw a bit of one--a line for the ground, a dotted one for the trail, a burst above and some clouds.

Comparison. I don't know how else to describe it, but fireworks are close. If they're shot into the sky, the noise rattles through one's head enough to sometimes hurt. If you look at them as they explode, the light falls apart and fades, but an imprint stays against your eyes, blocking out some vision with its shape for a few moments.
Finding my way to Hallownest was similar. The light of a firework stays in the eyes no matter what direction you look until it fades, but the 'mark' of the call stayed where I could 'see' to the South-West at all times when I tried to find it.
I abandoned the job to follow. I never stopped unless I was forced to. I don't have any frame of reference how long the journey was.