Very reassuring; but Mac's intrigued and speculative tone when he discussed the possibility was enough to send shivers up my spine.

Addels' voice took on a speculative tone.

She laughed at the speculative tone that her mother couldn't quite hide.

He began to speak in a speculative tone.

There might have been a speculative tone behind her words; but Ned was a man, and he knew that men thought that way.

At this stage of her work the speculative tone does not suit her.

The speculative tone, and the use of the word 'little' made her bristle all over again.

Pirrie remarked, in a speculative tone: 'I don't think it's going to be easy, even as a surprise attack.'

The outside gloom seemed to increase while Tharbel delivered his slow, speculative tones.

"Perhaps he needed it," suggested The Shadow, in a speculative tone.