Alexander and Edith 's marriage was in difficulties : but the pair agreed to adopt Peggy Piddock , born in 1918 , the daughter of Edith 's younger sister May , and they were both devoted to their daughter , which likely kept the couple together .
Alexander and Edith 's marriage was in difficulties : but the pair agreed to adopt Peggy Piddock , born in 1918 , the daughter of Edith 's younger sister May . 
 They were both devoted to their daughter , which likely kept the couple together .