Poor Jonas. Just in town to visit a friend, he'd apparently picked the wrong time to be in London. Wrong place, wrong time, as usual.
He felt Rose before he spot her. He got goosebumps for no good reason--and that was always a bad sign. He'd learned to follow his hunches over the years, and goosebumps always meant something wicked was this way coming. He stopped walking and stared up the street.
There was a woman down there. Since he couldn't really see anyone else, he assumed that the general reason for the bad feelings had to be her.
He started walking again, turning into the first alley he came across. As soon as he was out of sight he started to run.