This system for herself

My neighbour described how from being initially scornful of the way, as she said, this young girl who lived in our street walked along -- swivelling her hips in her slender, long jeans, the pale of her wrists turned forwards and her arms moving loosely alternately with her legs -- the whole effect, as she said, of a model stepping out in casual attire -- how, from feeling annoyed by this girl who never seemed to carry any kind of bag (as if she never had any errand but her walk along the catwalk of the street), this neighbour two doors along from my house (near the park) had taken to copying the girl's way of turning the pale of her wrists forwards and swinging them loosely as she walked since she could attest it had already begun to improve her posture -- already she felt years and years younger; much taller; even slim  -- and so now she could see there was a system in the walk (no doubt a secret of the catwalk) and that she was pleased that she had begun to learn this system for herself.