* The name is misspelled: Please double-check the spelling of the author's name.
* The author is not well-known: It's possible that this author has written works that are not widely published or known.
* You may be thinking of a different author: There might be an author with a similar name who you are mistaking for G. Frank Mathewson.
To find more information:
* Provide more details: If you can provide additional information, like the genre of writing, the time period they wrote in, or any specific titles, it will be easier to identify the author you are looking for.
* Use a search engine: Search for the author's name on Google, Amazon, Goodreads, or other online resources.
* Check with a librarian: A librarian can help you research authors and their works.
Let me know if you have any more information about the author you are looking for, and I'll be happy to help further.