Dianne, I have not come across your Miss Mima Ogle (yet), but I suspect Mima may be short for another name. My research has compiled about 230 Ogles from Cornwall to Leamington from 1850 to 1910 and as always I'm happy to share anything I have.
I'm not sure if you have found anyone for photograph book you had eight years ago, but I can shed some more light on S.S. No. 11. In 1871 the Ontario School Act was passed which made attending school mandatory and free for children ages 7 to 12. Since Morrisburg, Ontario is in South Dundas, I would suspect that the No. 11 school was located in the Upper Canada School District, perhaps S.S. No. 11 Whitteker School. The school district website has lots of historical school information for the area, including photos of many school houses. However, they have no images of No. 11 (currently) ... isn't that how things going in research ;)http://ucdsb.ss16.sharpschool.com/community/historical_schoo...
Perhaps Mima Ogle is related to the children George Ogle and Ellen/Helen McAllear from Cornwall, Stormont, Ontario.
If you are able to scan and share the book and images online, I would be greatly appreciative. Please let me know if I can help you in anyway.