In his article about Greg Bellow and his father Saul (“Mr. Bellow’s Planet,” May 10), Peter L. Rothholz writes that the Canadian-born Saul Bellow “is the only American Jewish author to have won the Nobel Prize in literature.” He is mistaken. Bellow had the distinction of being the first American to win the Prize for literature; however, two years later, in 1978, the Polish-born Isaac Bashevis Singer, who became a U.S. citizen in 1943, also was awarded the Nobel Prize in literature. He became the first (and only) American Yiddish writer to have received the prize.