Schwarz had been the senior partner in the four-man googly attack that had given South Africa its first golden age of Test cricket from 1905 to 1910. He had taken the googly from his former Middlesex team-mate B.J.T. Bosanquet — its inventor — and refined it for matting wickets. He played 20 Tests, taking 55 wickets at 25.76. By 1914 he was working in business in London. He enlisted in the King's Royal Rifle Corps, was commissioned, and served on the Western Front. He survived the war with a Military Cross. In November 1918, with the Armistice already signed, he was caught by the second wave of the Spanish influenza pandemic at the British base at Étaples. He died on 18 November, seven days after the war had ended. The pandemic killed at least 50 million people worldwide; Schwarz was one of an enormous number of cricketers, soldiers and civilians who survived the fighting only to die in the influenza wave.