I heard back from the owner of How To Do Things, mentioned in the "Books We Own" page listed below. No Horbals. The census in the book only covers Elkland, Kingston, Koylton and Novesta townships in the southern part of Tuscola county; Caro is in the north, and so it's not there. Oh well; maybe the company that did the book also did a version for the Greater Caro Metropolitan Area. It's just a matter of finding a copy.
Posted at 12:37:07 PM