* The name is a pseudonym: Many authors use pen names, so there might be a writer using "Old Cavalier" as their alias. However, without further information, it's difficult to find them.
* It's a typo or misremembered name: Perhaps you're thinking of a different author, and the name is slightly off.
* The author is lesser known: There are countless authors out there, some more famous than others. If "Old Cavalier" is a less prominent writer, it might be challenging to find information about them without more clues.
To help me find the author you're looking for, please provide me with more information, such as:
* Any other details about the author's work: Do you remember the genre, subject matter, or any specific titles?
* Where did you come across the name "Old Cavalier"?: Was it in a book, article, website, or another context?
With more information, I can potentially help you find the author you're looking for.