Lawrence Sutcliffe Walsh was born on 7 January 1916 in East London, South Africa, the son of Richard Chadwick Walsh, an engineer, and his wife Maria, née Schofield. He was educated at Selbourne College. In order to study medicine it was first necessary for him to qualify in pharmacy. Later he obtain

Joseph Block ('Joe') was born on 12 August 1921 in Bloemfontein, Orange Free State, South Africa. Both his parents had emigrated from Switzerland and were graduates of Zurich University; his father became a lawyer and his mother a professor of languages. He was educated at President Brand School, Gr