::OK I see what has happened. In 1827 a biography of Frances Augusta Bell (the Fanny mentioned in the quotation) was published and it included some of her personal correspondence, including some letters from Anning like the one about the storm of 1824. I think Torrens's main point, that the letter to The Magazine of Natural History was the only thing she ever submitted for publication is valid, and still worth noting even if we have to add a caveat that some of her private correspondence was printed during her life time.