Possible Clues:

• Answer the letters collectively to roughly say this is a renunciation of political belief
• The rejection of one's religion
• Rejection of one's faith
• Abandonment of a principle in a job, say, unfortunately
• Ditching faith in second year after sober group accepts situation
• Lynch leaves psychoanalyst in act of abandoning a cause
• Renunciation of a religious or political belief
• A job as barmy ultimately causing abandonment of faith
• Desertion from a place of duty, say, at sea
• Desertion from advanced position, simple losing head