I'm doing family research and any information would be helpful!o)
Not sure that I can help, though my parents lived in Dar-es-Salaam from 1948 to 1957, and I went to Mbeya School from 1951 to 1953 under Headmaster Wallington. It's very interesting to read all the recent blogs on Mbeya and Tanganyika, and I remember most of the names mentioned in the early 1950's. You could try the Muir family, the Crawshaw family, and the Wenban-Smith family, and several people have created their own websites.
Cheers, Michael Murphy.
Woking, Surrey, UK.