Background
He was born at Lancaster, the son of Rev Henry Lefroy Yorke, a Wesleyan minister, and his wife, Margaret Warrington, the eldest of four brothers and two sisters.
He was born at Lancaster, the son of Rev Henry Lefroy Yorke, a Wesleyan minister, and his wife, Margaret Warrington, the eldest of four brothers and two sisters.
He attended University School, Southport, and Epworth College, Rhyl, before studying medicine at the University of Liverpool.
In 1907, he joined the Liverpool School of Tropical Medicine. From 1914 to 1929, he was Walter Myers professor of parasitology, and from 1929 until his death he was the Alfred Jones professor of tropical medicine, University of Liverpool. During World War I, Yorke served as a Captain in the Royal Army Medical Corps, based in Malta from 1915-1916.
He returned to Liverpool in 1916, and produced more than thirty reports, "Studies in the treatment of malaria".
Royal Society.