There are several things we can learn from stones themselves, even ones that have been removed and placed in a cement wall such as these ones where. The shape, type of stone used, the way the inscriptions where carved (IE - tools used) and so forth can date the manufacture of the stone, and it's origin. There are literally whole books on the subject. Pictures alone seldom suffice. For example, I am sure the name of the stone cutter - sometimes placed on the back, sometimes on the front, near the bottom - was not recorded photographically on all these stones before their destruction.
There are many, many, many pioneer cemeteries across Ontario that have been destroyed in the past, but usually the stones end in some practical application. For example, my great-great-grandfather who fought with the GLI in the War of 1812 (the GLI was the regiment you read about when you learn of Laura Secord) - his pioneer grave stone is under a barn foundation down in the Ottawa valley area. However, the same thing has happened many times in London. I suspect there are people in this city who have old graves stones in the foundation of their house or under an old step or walkway and may not even be aware of it. This would apply to houses built right up to the 1950s.
I hope residents can comb through the rubble pile and recover whatever is possible, despite the poor weather



