Maigret and the Old People: Inspector Maigret, 56 (Unabridged‪)‬

Maigret is called to the home of Armand de Saint-Hilaire, a highly respected official who has been found shot dead in his study by his housekeeper. 

After interviewing everyone concerned, Maigret is at a loss to the identity of the perpetrator until he comes across a series of letters from the past 50 years between the victim and a recently widowed woman. 

As Maigret uncovers the details behind the two's relationship, he gets closer to discovering the tragic truth behind the official's demise. 

This novel has been published in a previous translation as Maigret in Society.