It took a little longer for the rumour to spread around the city, but in twos and threes the leaders of the great Guilds hurried into the University.

Then the ambassadors picked up the news. Around the city the big semaphore towers faltered in their endless task of exporting market prices to the world, sent the signal to clear the line for high-priority emergency traffic, and then clack'd the little packets of doom to chancelleries and castles across the continent.

They were in code, of course. If you have news about the end of the world, you don't want everyone to know.