Catherine Derbyshire
From WikiDelia

Delia's only sibling, Catherine Derbyshire, born 17th January 1939[1] and hence two years younger, died in 1943[2], aged 4, of peritonitis.[3]

Delia's only sibling, Catherine Derbyshire, born 17th January 1939[1] and hence two years younger, died in 1943[2], aged 4, of peritonitis.[3]