Boyhood friends/birthdays

In 1956/7 I attended a secondary school called St Michael and St George's (I think) near a town Iringa in Southern Tanzania. There I formed a close friendship with another 16 year old, David Leonard. His father was a miner on a small gold mine near Mwanza in Tanzania and we (my father was in the colonial administration) lived some 150 miles away in the same area. We both left the school in 1957, I joined the British army and came to the UK and he followed me to stay with relatives a little later. Over the next 2 years we saw each other on a number of occasions, then in 1960 I emigrated to Rhodesia (as it then was), and there being to internet and neither of us being addicted to letter writing we lost all further contact. However, I had not forgotten him and in 2004 when I returned to the UK permanently I got my daughter to put out feelers in the internet, she turned up a couple of David Leonards but not the one I knew and I gave up. In 2011/12 I owned a small corner shop in Cheltenham which my youngest daughter and son-in-law managed and at this time I decided to sell it and asked my son-in-law to find an estate agent and put it in the market. He put it in the hands of one based in Surrey (or Sussex - can't recall), how he made the choice out of the thousands available have no idea. The sale was protracted and one day it occurred to me that the head of the estate agency was called Leonard. Neither a very common or uncommon name. The next time I spoke to him I asked casually if his family had ever lived on the Geita Mine. He was David Leonard's younger brother. Sadly my friend had died 5 years previously, particularly sad as my sister still lived in Tanzania and I had visited her a number of times and could easily have found him! A more statistical type coincidence was that both my wives shared a birthday and both my mother'-in law did as well. Jeremy Lousada