Here is an article that appeared in "The Laikipia Focus" in July 1997:
"Suicide - A British couple and their pet dog committed suicide early this year at their Nanuki home. The man, Peter, is said to have injected himself with a poisonous substance while his wife Margaret inhaled carbon monoxide with their dog"
Peter was a great painter whose paintings of African Wildlife were sold at the Mt. Kenya Safari Club. He seemed to be depressed in the year or so that I knew him. My observations were that though they were both born in Kenya they lived in a world that was apart from the Africans. They seemed to be isolated from the very country that they lived in due to their 'Colonialist' view of Africans.