A couple of days later, he gets ready to travel.
He hesitates, then decides to leave his Rekkan joey at home. He's not prone to losing or breaking things, but the small chance is still too high. It feels weird not to have his library with him, but there is a large chunk of it on his phone now (and the remote-backup service he recently signed up for), and if he wants to do some work while he's out, he can record folk songs or mnemonics or language samples of signed Tashayan.
He does bring his customary alien bag with its customary collection of alien artifacts, minus the samples of ration bar and medications he's giving to science. (Upon reflection, he also removes the money from his wallet and replaces it with his new Thomassian debit card: it's silly to spend weight on carrying Tashayan coins around in a place that doesn't take them as currency.)
He wears his Thomassian respirator, too. He...at this point, he would be more surprised if the Thomassians made him sick than if they didn't, and he suspects that even if he did get sick some medical care and time would handle it okay, but he's not super sure; and anyway, he expects it will be emotionally easier to handle being in a hive-city if he's not actually sharing breath with a million people.
On his way out, he takes a picture of Rellakri wearing the little hat, the first entry in his travel photo album. "The robot petsitters will take good care of you," he tells the bird, giving it one last pat.
And then he sets off, to explore the nearest city.