The barbarians just built a city right where I planned to build my 3rd city.
Actually that's a good thing, because it saves me a settler.
However, obviously I have to wait until barb city grows to pop 2, otherwise it will be auto-razed. It's been quite a few turns, though, and the city hasn't grown yet.
How long does it usually take for barb cities to grown from pop 1 to pop 2?
Actually that's a good thing, because it saves me a settler.

How long does it usually take for barb cities to grown from pop 1 to pop 2?