Therem Harth re ir Estraven Timeline and Summary

Estraven gets Ai an audience with King Argaven. Then he's promptly exiled.
He goes to Orgoreyn, because where else is he going to go?
Working his way through the Orgoreyn ranks, he learns Ai is there trying to complete his mission.
Estraven decides to help the Earthman out again. It works about as well as last time.
When he learns Ai has been taken to the Volunteer Farm, Estraven stages a daring rescue.
Together, he and Ai trek their way across the barren and dangerous wilderness of the Ice.
Back in Karhide, he asks his friend Thessicher to hide him.
Nope. Thessicher betrays him.
Estraven tries to gun-it and run-it back to Orgoreyn but is shot and killed at the border.