Only, close there beside her, she heard him breathe, panting short and quick even as a dog pants, while a certain vibration seemed to run along the rough ironwork against which she leaned.
(the rough ironwork; leaned; she) (a certain vibration; seemed; ) (a certain vibration; to run; L:along the rough ironwork)
the rough ironwork a certain vibration a certain vibration
leaned seemed to run
she
L:along the rough ironwork