How to use "confirmed" in a sentence

Descending from these general principles, we find the proposition that in legal contemplation the Union is perpetual confirmed by the history of the Union itself

'Oh, yes, Mr Sampson,' the clerk confirmed

They were going to great lengths to avoid using violence, which confirmed Elliot's suspicion that they wanted to leave him unmarked, so that later his body would bear no cuts or bruises incompatible with suicide.

Mr Kyrle confirmed to Mr Frederick Fairlie that Laura was in fact his niece and not Anne Catherick