’Yes,’ said the collector, with a dubious shrug of his shoulders, ’He is gentlemanly, very gentlemanly—in appearance.’
Miss Squeers glanced at the door, as if dubious of the propriety of advancing any nearer to an utter stranger; then round the schoolroom, as though in some measure reassured by the presence of forty boys; and finally sidled up to Nicholas and delivered the pen into his hand, with a most winning mixture of reserve and condescension.
There are no more uses of "dubious" in the book.
Show samples from other sources
She was dubious, but agreed to come with us anyway.
She has a dubious reputation. I wouldn’t count on her.