He acted upon this impulse without delay, and choosing the least frequented roads began his journey back, resolved to lie concealed within a short distance of the metropolis, and, entering it at dusk by a circuitous route, to proceed straight to that part of it which he had fixed on for his destination.
There are no more uses of "circuitous" in the book.
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The explanation was circuitous and puzzling.
It is a long and circuitous journey by train and then mountain road.