To provide more specific information, I'd need some additional context. For instance, do you know:
* When he was active? Knowing the approximate time period of his writing would help narrow down potential publications.
* What genre he wrote in? This could include fiction, non-fiction, poetry, or other forms.
* Any specific titles or topics he wrote about? Even a vague memory of a book title or subject could be helpful.
With more information, I might be able to locate more details about Charles Wyllys Betts and his writing.