I completed my matriculation at DHS in 1955. Theo taught me Latin and English in 5th class and 6th class. He was an inspiring teacher. I endorse all the compilments that have been paid to him here. On a point of fact, I am fairly sure that he was a teacher at the boarding school in my time. Even then he had a reputation for caning, some said sadistically. So I don't think he acquired that habit only for the last period of his tenure after his mother died. In my time I never heard it said that he lived above the tea room, which renforces my memory that he lived at the boarding school. (Was the "tea room" the same place that we called the "tuck shop"?). I heard a rumour that he had been killed. I am glad to read that that was not the case, although suffering from  dementia, if that is what he died of, is also a sad ending to a career of excellence and devotion. He was the greatest educator I ever encountered in all my school and university studies on four continents.