confidentially

The girls can talk quietly and confidentially, if they choose.

He approached, on his side, confidentially, but not too markedly so.

Confidentially, 'Father, I sometimes thought of it, but it rather scared me!

He confessed to them confidentially that he was the real boss of the building.

"I don't think she was intendin' to," remarked the latter, confidentially.

“Mary takes after her pa, poor child,” she had told Trudy confidentially.

"I was like everybody else tell I had the fever," continued Driscoll, confidentially.

"Confidentially, of course," said Sewell, with a sneer so slight as not to be detected.

"You see, the old chap has all the money," whispered Chester confidentially.

Are the contents to be considered professionally, that is, confidentially?