Since yesterday, I found them in 1940 in Lansing City which said they were in Detroit in 1935 (don't have that). Also in 1930 they were in Ypsilanti. I also found them in 1900 in Port Huron although I did not find them in 1910 or 1920. Maybe they did go back to Canada for a while and I will check that. Thank you so very much for your help.It is much appreciated.