I was having a discussion on Twitter (yes, I live on Twitter) about the fact that no one I know has been able to document Georgian/Regency engagement announcements in the newspapers. They confined themselves to deaths, marriages, and births (and many of these announcements don't even include the name of the lady/mother: "A son was born to Lord Soandso." "Lord Soandso has married the eldest daughter of the Earl of Blah."
But the fabulous Susanna Kearsley
shared with us a very clever way an author can get around this if they NEED an engagement to be in the papers: Gossip columns! She even posted several examples: