By that time he was already working as a research assistant to Karl Pearson in University College, London. He took up this post in January 1927 and his first published papers are on the theory of correlation.
Sa pamamagitan ng panahon na siya ay nagtatrabaho bilang isang research assistant sa Karl Pearson sa University College, London. He took up sa post na ito sa January 1927 at sa kanyang unang nai-publish na mga papeles ay sa teorya ng mga ugnayan.