A small mercy, that, thought Barristan Selmy, as he rode into the market square inside Meereen’s great western gate. When Daenerys had taken the city, they had broken through that same gate with the huge battering ram called Joso’s Cock, made from the mast of a ship. The Great Masters and their slave soldiers had met the attackers here, and the fighting had raged through the surrounding streets for hours. By the time the city finally fell, hundreds of dead and dying had littered the square.
These lines have been taken from A song of Ice and Fire. Shouldn't the bold part be something like by the time the city had finally fallen?