Having made her decision to complete the mathematics honours course, Cartwright was fortunate to meet a fellow student V C Morton. Morton was a fine mathematician - he later became Professor of Mathematics at Aberystwyth - and he gave her very sensible advice.
Sa pagkakaroon ng kanyang desisyon na ginawa upang makumpleto ang matematika honours course, Cartwright ay masuwerte upang matugunan ng mga kapwa mag-aaral VC Morton. Morton ay isang mabuting dalubbilang - siya mamaya ay naging Propesor ng Matematika sa Aberystwyth - at ibinigay niya ang kanyang mga tunay ng matinong payo.