During his period as a research student he had many famous geometers as fellow research students and he formed a particular friendship with Coxeter and Semple .
Sa panahon ng kanyang panahon bilang isang estudyante sa research niya maraming mga bantog na geometers bilang kapwa mag-aaral at pananaliksik siya nabuo ng isang partikular na pagkakaibigan sa Coxeter at Semple.