Found on the back of a 1946 green Penguin Death and the Pleasant Voices by Mary Fitt this self-penned portrait of herself. Mary Fitt (1897-1959) is fairly well covered online, both under her real name Kathleen Freeman, and her pseudonym – under which she wrote classic late golden age detective fiction. As Kathleen 
Freeman she wrote many books on Ancient Greece, Socrates, the Sophists etc, She lived near Cardiff with a friend Lilian Clopet also a writer – Lilian survived her by 30 years. There is a good bibliography of both writers at the University of Toronto site. The piece on the back of the Penguin is charming and informative:
Asked for a biography, Mary Fitt says:
‘It is, I think, the writer of fiction who is interest to the public, not the person of whom the writer is a part. Therefore I do not propose to give details of where I was born, where educated, and so forth. In my character as Author, I was born some years later than myself, in that part of the world which lies between classical Greece and Elizabethan England.
‘In the present, the Author and I have identical interests. We live in the country, in what a friend recently described as “your Italian-blue house”. It is not Italian, but it is blue – sky-blue*. Our hobbies are – our hobby is – people, their pleasant or queer or sinister possibilities; for we have noticed that Character really is Destiny.
‘Such a hobby involves travelling; so we travel, but not as Author: people see authors coming and they “talk script”; we like to see and hear them as they are off the set, because what they then say and do is new.
‘My interests range over time and space. My greatest regret is that one day I too shall have to pack up and leave this caravanserai, which is so mad, so bad, and so wonderful.’
*Lark’s Rise, a house in St. Mellons.