In 1939 Roger's father went to the United States with his family but as all the indications pointed towards the outbreak of war, he decided not to return to England with his family but accepted an appointment in a hospital in London, Ontario, Canada. Roger attended school in London, Ontario but although it was during this period that he first became interested in mathematics it was not his schooling which stimulated this interest, rather it was his family.
Sa 1939 Roger's ama nagpunta sa Pilipinas sa kanyang pamilya ngunit ang lahat ng mga bilang indications nakatutok sa pag-aalsa ng mga digmaan, siya ay nagpasya na hindi bumalik sa Inglatera sa kanyang pamilya ngunit tinanggap ng appointment sa isang ospital sa London, Ontario, Canada. Roger nakapag-aral sa London, Ontario pero kahit na ito ay panahon na ito na siya unang naging interesado sa matematika ito ay hindi kanyang-aaral na stimulated interes na ito, sa halip ito ay sa kanyang pamilya.