Leentje Hamburger was a dentist. From 1913 onwards, she led a very solitary life with her housekeeper at Stationsstraat 43 in Alphen. A neighbour boy stopped by her house each day after school (at the modern grammar school) to drink tea with her. She took him into her confidence. Beyond that, she had no human contact at all and was quite reclusive. Later, she let the boy’s mother and brother pay h…