Etty catalogues and indexes the library of magic.
Since she has not had luck finding Astgabels or anyone who can direct her to it by flying in slightly different directions each day and asking random people, she stops trying, and instead tries to come up with ways to rejigger the available divination spells into producing a compass direction for her to follow. Or maybe she can come up with some variant on the food-generation spell that would be practical for a long trip, and bring Nona with her, and then they could be gone for days looking farther afield than she can get in half a day's flight.
Eventually she finds a spell that is not exactly right, but might be close enough, and she shows it to Nona.
Since she has not had luck finding Astgabels or anyone who can direct her to it by flying in slightly different directions each day and asking random people, she stops trying, and instead tries to come up with ways to rejigger the available divination spells into producing a compass direction for her to follow. Or maybe she can come up with some variant on the food-generation spell that would be practical for a long trip, and bring Nona with her, and then they could be gone for days looking farther afield than she can get in half a day's flight.
Eventually she finds a spell that is not exactly right, but might be close enough, and she shows it to Nona.