 A son , Geoffrey Bruce Oliphant , was born 6 October 1930 , but he died of meningitis on 5 September 1933 , and was interred in an unmarked grave in the Ascension Parish Burial Ground in Cambridge alongside Timothy Cockcroft , the infant son of Sir John and Lady Elizabeth Cockcroft , who had died the year before . Unable to have more children , the Oliphants adopted a four @-@ month @-@ old boy , Michael John , in 1936 , and a daughter , Vivian , in 1938 . 
