When I was sixteen, I was sent to a private boarding school to study for my A-levels. The school was run by two sisters, both in their late thirties.  Miss Isobel was the headmistress, and Miss Arabella, the deputy headmistress. There weren’t many boys, perhaps about twelve, so all the lessons were conducted by the two sisters. Being aged sixteen to eighteen, and with a restricted syllabus, it was easy for just two teache...