Estraven spends the last of his money on supplies, and the pair begin an 80-day trek across the Gobrin ice sheet back to Karhide, because Estraven believes that the very appearance of Ai in Karhide will force its acceptance of the Ekumen treaty.
Estraven spends the last of his money on supplies, and then steals more, breaking his own moral code which would forbid stealing. The pair begin an 80-day trek across the Gobrin ice sheet back to Karhide, because Estraven believes that the very appearance of Ai in Karhide will force its acceptance of the Ekumen treaty.