During one of Hawking 's father 's frequent absences working in Africa , the rest of the family spent four months in Majorca visiting his mother 's friend Beryl and her husband , the poet Robert Graves .
[ 30 ] [ 31 ] During one of Hawking 's father 's frequent absences working in Africa , [ 32 ] the rest of the family spent four months in Majorca visiting his mother 's friend Beryl and her husband , the poet Robert Graves .