Claude Anet
Claude Anet was the adopted name of Jean Schopfer, a Swiss national born in 1868 (he died in 1931). He had been a tennis champion in his youth, he was the French champion in 1892. He turned to golf after retiring from tennis.
He was a prolific author on a wide range of subjects (he wrote a biography of Suzanne Lenglen). He had visited Russia during the war, and his book "Through the Russian Revolution" was written from the point of view of a bystander during the critical first few weeks of the first revolutionary period.