Later he undertook research on molecular orbital theory under J E Lennard-Jones. Winning a prize fellowship in 1934, he was awarded his PhD in 1936.
Mamaya siya undertook pananaliksik sa molekular orbital theory sa ilalim ng JE Lennard-Jones. Panalong ng isang premyo relasyon sa 1934, siya ay iginawad sa kanyang PhD sa 1936.