Samuel Harold Cookson gained a science degree in 1920 from the University of Birmingham and graduated in medicine in 1923. He obtained a post as house physician at the Brompton Chest Hospital, and then as medical registrar at the Middlesex Hospital. His primary interest was in cardiology and he was a consultant in this field to the Ministry of Pensions (now the DHSS). His other interests lay in thyroid diseases, and in diseases of the nervous system. He wrote several papers on these subjects.
He was appointed honorary consultant physician to Poole General Hospital, Hampshire. He was a very private, rather solitary man and after his retirement from medicine, around 1966, he had little contact with his old colleagues. He died in Poole General Hospital after a long illness. His wife survived him.
Sir Gordon Wolstenholme