  Robert Bull, who was Arthur’s student from 1957, remembered him taking his church duties flippantly. On one occasion Arthur broke off a conversation about logic with a puckish ‘I’ve got to go and deliver the fucking communion cards’. Mary laughed, exclaiming ‘Arthur!’. The cards were invitations to the communion service and, as an elder, he was obliged to deliver one to each person in his district. By this time, the Priors’ religious observance was probably just a matter of not wanting to upset the boat—and perhaps especially not the Reverend Frank Wilkinson, Mary’s father.