Pomeroy's Postscript was one that told his twin sister Marguerite definitely not to come to the Cornish coast where Pomeroy had been placed by their trustees in charge of a certain Mrs. Livingstone. And thereby hangs a tale.
"Mary Fitt" was the pen-name used for her crime novels by Dr. Kathleen Freeman, who for several years was Lecturer in Greek at the University of Wales at Cardiff.
I originally read Pomeroy's Postscript as a kid in my local library and the story stuck with me (though the title did not). Decades later I was able to track down the title and ultimately a copy of the book, but I shelved it without rereading. I recently rediscovered the book on my shelves and am delighted to report it was as enjoyable a read now as all those many years ago. I like that it is an adventure story that focuses on a female character (Marguerite) rather than on her twin brother (Pomeroy). Sort-of cousin Merritt is another great character that rounds out the story - bookish and clever but somewhat uncertain of himself socially. Though the book was written in the 1950s, there isn't actually much about it that is dated (other than a few lines at the very end about Uncle Sam handling everything as if Aunt Maud wasn't capable of doing so). All in all an enjoyable reread of a story I very much enjoyed as a kid. 4.5 stars.