doubtingly

He spoke in his usual matter-of-fact, rather dry tone, and Nan looked up at him doubtingly.

Crowned heads might look on doubtingly, but the foundation had been laid in justice and truth and equality of right.

Massoni shook his head doubtingly, 'No disguise would avail against her craft.'

They deliberated, doubtingly, and it soon became evident that the crisis had passed.

The number of species of orchids known in his time Lindley doubtingly estimated at 3000.