Author: H. W. Turnbull
Alternate names: Herbert Westren Turnbull; Herbert Western Turnbull
Born: 1885
Died: 1961
Bio: Herbert Westren Turnbull FRS FRSE LLD was an English mathematician. From 1921 to 1950 he was Regius Professor of Mathematics at the University of St Andrews. *--Wikipedia*

*Photo Attribution:* University of St Andrews, Scotland, Public domain, via Wikimedia Commons