Definition of "crawling"

Miss Brass […] devoted herself with uncommon ardour to the study of the law; not wasting her speculations upon its eagle flights, which are rare, but tracing it attentively through all the slippery and eel-like crawlings in which it commonly pursues its way.

1840 April – 1841 November, Charles Dickens, “(please specify the chapter number or name)”, in The Old Curiosity Shop. A Tale. […], London: Chapman and Hall, […], published 1841