* Misspelling or Incorrect Name: Perhaps the name you're looking for is slightly different. Double check any sources you're using and see if there are any variations.
* Less Known Author: It's possible Ethel Law Ryan is a real person, but a lesser-known author. If this is the case, you might have difficulty finding information online.
* Pseudonym: It's possible "Ethel Law Ryan" is a pseudonym, and the author published under a different name.
To help you further, could you provide any additional information you have about this author? For example:
* Genre of their writing: What kind of books did they write (fiction, non-fiction, poetry, etc.)?
* Approximate timeframe: When did they write?
* Any specific book titles: Do you know the title of any of their works?
With more details, I might be able to provide a more helpful answer!