Then he was underneath the great arch of the Byward Tower, an elevated building thrown over Water Lane to control the Tower's land approach. A raven perched on a gargoyle and screeched 'Cromwell!' at him as he passed through onto the drawbridge that ran from Byward Tower out to Middle Tower, over the moat. Middle Tower gave way to Lion Tower – but the King's menagerie were all asleep and he did not hear the lions roar. From there he crossed over a last little backwater of the moat, over another drawbridge, and came into a little walled-in yard called the Bulwark – finally, then, through one last gate and into the world, though he had a lonely stroll over an empty moonlit glacis, past a few scavenging rats and copulating dogs, before he was among buildings and people.