Exactly as the title, what does "nine-and-twenty" mean?
Here's an example of sentence:
Afraid of him! No, indeed! But I wish you will consider that a man of nine-and-twenty won’t relish having his affairs meddled with. Besides, he will very likely wonder what the deuce it has to do with me, and I’m sure I can’t tell him! I wish I had not come.
The Corinthian, Georgette Heyer, 1940