It's no mystery that she was born in 1890 in Devon, England, wrote 67 novels under this name & 6 as Mary Westmacott
Poirot is asked by a friend, who is the director of the ... Agatha 
Mary Clarissa Miller was born on 15 September 1890 in Torquay, Devon, South... [DOC] [TLE] Mary Westmacott | Project Gutenberg Self-Publishing - eBooks ... [PAR] Dame Agatha Mary Clarissa Christie, DBE (born Miller; 15 September 1890  12 
... She also wrote six romances under the name Mary Westmacott, but she is best 
... And Then There Were None is Christie's best-selling novel with 100 million 
sales to date, ....