Priscilla Russell-Cooke Phipps and her twin brother Simon were born June 18, 1923 to Captain E. J. Smith's only child, Helen Melville Smith Russell-Cooke. Simon died in 1944 while serving in WWII having never married. Priscilla married in 1946 to a lawyer named John Constantine Phipps but died only a year later from polio. There were no children of her brief marriage and Capt. Smith's direct line of progeny would end with her untimely death.