Clara refused to become "Professor Mercer's wife" in public life.
She completed training in rehabilitation medicine and developed music-based programmes for patients recovering from neurological injury and long cancer treatment.
She remained involved in the access centre and continued performing.
At conferences, people sometimes asked Daniel whether Clara's music was "a hobby."
He learned not to answer for her.
Clara answered perfectly well herself.
"Medicine is my profession. Music is also work. Marriage is neither of those."
Daniel loved her more every time.
They eventually had twins.
Neither child showed early interest in nuclear physics.
Daniel considered this a failure of parenting.
Clara considered it evidence of successful parenting.