On page 40 of the Suns of Fortune supplement I was reading that "Nashal is a sprawling and lovely riverside city of half a million citizens." Further on the page though in the description of Qaestar Town it says, "The largest city on Talus -- and the Double Worlds -- with a quarter million people..."
By my math the city of Nashal (located on Talus) is twice as large as the largest city on Talus...?