I'm delighted to hear from you -- I had pretty much given up hope of finding anything on Mary Cozens until the 1931 or 41 Census was released!
Yes, I would be happy to share her letters with you (they do give a delightful sense of her personality), and to hear more about her. I can also tell you more about my particular interest in her.
You can also reach me on the following email address (which I've transliterated so as to avoid harvesting by spambots): ramp ('at') uleth ('dot') ca
With best wishes,