There are a few possibilities:
* Typo: Maybe you're thinking of a different name with a similar spelling. Could you check the name again?
* Less Known Author: It's possible there's a writer named Pat Humphries who works in a specific niche or genre, and they haven't achieved widespread fame.
* Different Medium: Perhaps Pat Humphries is a writer in a different medium, such as screenplays, stage plays, or journalism.
To help me find more information, please provide any additional details you might have, such as:
* Genre: What kind of writing do you think they specialize in?
* Approximate time period: When did you encounter this name?
* Any other information: Do you have any more details about their work or where you saw their name?
With more information, I might be able to find the author you're looking for.