Thalos used the tracker Percy gave him to find the Whitemoon's hideout. First he hadnto leave the city and find another entrance. One where Dorian's guards couldn't see him.
There were guards patrolling the walls and you had to be checked to enter, but he knew for the right price someone could enter from another place. He originally considered just jumping over the wall but someone might see him.
So instead he trekked through the slums. Head lowered with his brown cloak. All around him were decrepit wooden shacks and people walking around in rags, or sitting and extending metal cups as he passed.
They all reminded him of himself in a way, years ago. But people in the north don't get as tanned and leathery as the people here, and they weren't quite as bold.
He was following a woman with a basket of apples that he assumed she wanted to sell in the city, assuming she knew a hidden path into the city. But there were four men following her too.
