I've been reading some fascinating articles on his life. He moved to Kenya in 1955 - before independence - and was the country's first national coach. But he got sacked before the 1968 Games. Sports Illustrated in September of 1968 a fascinating article on his role in Kenya, why he was canned, etc. Some thought it was cause he was white, some thought it was jealousy that he was getting a lot of credit, etc. Here is that 1968 SI article.
Here is a AFP article on his death.