‘Technically,’ replied Mac, ‘it is an empty lake but that fact suits our purposes even more.’
He smiled and Inteachán felt pleased inside.
‘We, or should I say, you, are going to descend into the depths of the mountain, find a way to open up Tibradden Lough and then let it fill with the city’s floodwater.’
‘Open it up?’ said Inteachán.
‘Yes,’ said Mac, ‘open it up.’
He walked to the nearest bookcase.
‘This whole island is a network of channels and underground routes; the same as the city.’
Mac found the book he was looking for.
‘And just like plots and histories and civilizations and sewage systems, everything is connected somewhere.’