He turned slowly down Aldersgate Street, and was pondering his way along towards Saint Paul’s, purposing to come into one of the great thoroughfares, [...]
(From Little Dorrit by Charles Dickens, Chapter 13)
What does the term 'pondering his way along" mean? Does it mean that Clennam was pondering about something while walking along towards Saint Paul's? Or he was pondering about his destination?
Is pondering a transitive verb in the above passage or just an intransitive verb with "his way along towards.." being an adverbial phrase?