It's possible that:
* The name is misspelled or a variation of a different author's name. Perhaps there's a similar name with a slightly different spelling.
* The author is obscure or hasn't published widely. There could be books or writings by this author that haven't been digitized or widely cataloged.
To help me find more information, could you please tell me:
* Where did you encounter this name? (e.g., a book, a website, a list)
* Do you have any other details about the author? (e.g., approximate date of publication, genre, subject matter)
With more information, I might be able to locate more details about Frederick Horace Garner's work.