I too am trying to locate Sumner Maclean. I hope it is the same one; with a name like his, there cannot be too many. The man I know lived in Quebec City for a few years, during the eighties. I was then teaching at Laval U., and that's how I met him. He then moved to Alberta, around 1986, and after that, during the nineties, lived in France for a few years, more precisely in La Chapelle sur Erdre. Haven't heard from him since then. Would like to hear from him.